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Finding the Fourth Proportional to 779,910.70, 1,169,866.05 and 219,040.30

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Solution

The fourth proportional to 779,910.70, 1,169,866.05 and 219,040.30 is: 328,560.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    779,910.70 : 1,169,866.05 = 219,040.30 : x
  2. Step 2: Convert to fraction form
    779,910.70/1,169,866.05 = 219,040.30/x
  3. Step 3: Cross multiply
    779,910.70x = 1,169,866.05 × 219,040.30
  4. Step 4: Simplify right side
    779,910.70x = 256,247,810,551.82
  5. Step 5: Solve for x
    x = 256,247,810,551.82/779,910.70
  6. Step 6: Final answer
    x = 328,560.45

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.