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Finding the Fourth Proportional to 766,696.76, 1,058,048.78 and 422,545.12

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Solution

The fourth proportional to 766,696.76, 1,058,048.78 and 422,545.12 is: 583,116.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,696.76 : 1,058,048.78 = 422,545.12 : x
  2. Step 2: Convert to fraction form
    766,696.76/1,058,048.78 = 422,545.12/x
  3. Step 3: Cross multiply
    766,696.76x = 1,058,048.78 × 422,545.12
  4. Step 4: Simplify right side
    766,696.76x = 447,073,348,710.95
  5. Step 5: Solve for x
    x = 447,073,348,710.95/766,696.76
  6. Step 6: Final answer
    x = 583,116.26

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.