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Finding the Fourth Proportional to 719,280.86, 992,605.50 and 396,988.65

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Solution

The fourth proportional to 719,280.86, 992,605.50 and 396,988.65 is: 547,843.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,280.86 : 992,605.50 = 396,988.65 : x
  2. Step 2: Convert to fraction form
    719,280.86/992,605.50 = 396,988.65/x
  3. Step 3: Cross multiply
    719,280.86x = 992,605.50 × 396,988.65
  4. Step 4: Simplify right side
    719,280.86x = 394,053,117,427.58
  5. Step 5: Solve for x
    x = 394,053,117,427.58/719,280.86
  6. Step 6: Final answer
    x = 547,843.19

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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.