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Finding the Fourth Proportional to 318,728.76, 478,909.14 and 240,579

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Solution

The fourth proportional to 318,728.76, 478,909.14 and 240,579 is: 361,484.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,728.76 : 478,909.14 = 240,579 : x
  2. Step 2: Convert to fraction form
    318,728.76/478,909.14 = 240,579/x
  3. Step 3: Cross multiply
    318,728.76x = 478,909.14 × 240,579
  4. Step 4: Simplify right side
    318,728.76x = 115,215,481,992.06
  5. Step 5: Solve for x
    x = 115,215,481,992.06/318,728.76
  6. Step 6: Final answer
    x = 361,484.42

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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.