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Finding the Fourth Proportional to 318,654.18, 478,061.46 and 261,823.23

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Solution

The fourth proportional to 318,654.18, 478,061.46 and 261,823.23 is: 392,800.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,654.18 : 478,061.46 = 261,823.23 : x
  2. Step 2: Convert to fraction form
    318,654.18/478,061.46 = 261,823.23/x
  3. Step 3: Cross multiply
    318,654.18x = 478,061.46 × 261,823.23
  4. Step 4: Simplify right side
    318,654.18x = 125,167,595,595.72
  5. Step 5: Solve for x
    x = 125,167,595,595.72/318,654.18
  6. Step 6: Final answer
    x = 392,800.73

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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.