Home / 728,639.48-1,005,520.50-406,349.92

Finding the Fourth Proportional to 728,639.48, 1,005,520.50 and 406,349.92

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Solution

The fourth proportional to 728,639.48, 1,005,520.50 and 406,349.92 is: 560,761.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,639.48 : 1,005,520.50 = 406,349.92 : x
  2. Step 2: Convert to fraction form
    728,639.48/1,005,520.50 = 406,349.92/x
  3. Step 3: Cross multiply
    728,639.48x = 1,005,520.50 × 406,349.92
  4. Step 4: Simplify right side
    728,639.48x = 408,593,174,733.36
  5. Step 5: Solve for x
    x = 408,593,174,733.36/728,639.48
  6. Step 6: Final answer
    x = 560,761.78

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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.