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Finding the Fourth Proportional to 485,320.98, 669,793.04 and 291,792

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Solution

The fourth proportional to 485,320.98, 669,793.04 and 291,792 is: 402,703.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,320.98 : 669,793.04 = 291,792 : x
  2. Step 2: Convert to fraction form
    485,320.98/669,793.04 = 291,792/x
  3. Step 3: Cross multiply
    485,320.98x = 669,793.04 × 291,792
  4. Step 4: Simplify right side
    485,320.98x = 195,440,250,727.68
  5. Step 5: Solve for x
    x = 195,440,250,727.68/485,320.98
  6. Step 6: Final answer
    x = 402,703.07

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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.