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Finding the Fourth Proportional to 578,251.30, 866,502.15 and 489,021.70

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Solution

The fourth proportional to 578,251.30, 866,502.15 and 489,021.70 is: 732,792.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,251.30 : 866,502.15 = 489,021.70 : x
  2. Step 2: Convert to fraction form
    578,251.30/866,502.15 = 489,021.70/x
  3. Step 3: Cross multiply
    578,251.30x = 866,502.15 × 489,021.70
  4. Step 4: Simplify right side
    578,251.30x = 423,738,354,446.66
  5. Step 5: Solve for x
    x = 423,738,354,446.66/578,251.30
  6. Step 6: Final answer
    x = 732,792.74

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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.