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Finding the Fourth Proportional to 555,351.87, 766,386.13 and 300,702.45

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Solution

The fourth proportional to 555,351.87, 766,386.13 and 300,702.45 is: 414,969.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,351.87 : 766,386.13 = 300,702.45 : x
  2. Step 2: Convert to fraction form
    555,351.87/766,386.13 = 300,702.45/x
  3. Step 3: Cross multiply
    555,351.87x = 766,386.13 × 300,702.45
  4. Step 4: Simplify right side
    555,351.87x = 230,454,186,937.02
  5. Step 5: Solve for x
    x = 230,454,186,937.02/555,351.87
  6. Step 6: Final answer
    x = 414,969.68

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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.