Home / 728,389.65-1,092,899.70-391,036.71

Finding the Fourth Proportional to 728,389.65, 1,092,899.70 and 391,036.71

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Solution

The fourth proportional to 728,389.65, 1,092,899.70 and 391,036.71 is: 586,724.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,389.65 : 1,092,899.70 = 391,036.71 : x
  2. Step 2: Convert to fraction form
    728,389.65/1,092,899.70 = 391,036.71/x
  3. Step 3: Cross multiply
    728,389.65x = 1,092,899.70 × 391,036.71
  4. Step 4: Simplify right side
    728,389.65x = 427,363,903,047.99
  5. Step 5: Solve for x
    x = 427,363,903,047.99/728,389.65
  6. Step 6: Final answer
    x = 586,724.29

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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.