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Finding the Fourth Proportional to 424,740.85, 636,363.90 and 399,455.89

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Solution

The fourth proportional to 424,740.85, 636,363.90 and 399,455.89 is: 598,480.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,740.85 : 636,363.90 = 399,455.89 : x
  2. Step 2: Convert to fraction form
    424,740.85/636,363.90 = 399,455.89/x
  3. Step 3: Cross multiply
    424,740.85x = 636,363.90 × 399,455.89
  4. Step 4: Simplify right side
    424,740.85x = 254,199,306,447.46
  5. Step 5: Solve for x
    x = 254,199,306,447.46/424,740.85
  6. Step 6: Final answer
    x = 598,480.95

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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.