Home / 820,376.10-1,230,564.15-781,010.10

Finding the Fourth Proportional to 820,376.10, 1,230,564.15 and 781,010.10

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Solution

The fourth proportional to 820,376.10, 1,230,564.15 and 781,010.10 is: 1,171,515.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,376.10 : 1,230,564.15 = 781,010.10 : x
  2. Step 2: Convert to fraction form
    820,376.10/1,230,564.15 = 781,010.10/x
  3. Step 3: Cross multiply
    820,376.10x = 1,230,564.15 × 781,010.10
  4. Step 4: Simplify right side
    820,376.10x = 961,083,029,847.92
  5. Step 5: Solve for x
    x = 961,083,029,847.92/820,376.10
  6. Step 6: Final answer
    x = 1,171,515.15

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Double scale
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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.