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Finding the Fourth Proportional to 478,451.03, 659,970.45 and 284,728.86

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Solution

The fourth proportional to 478,451.03, 659,970.45 and 284,728.86 is: 392,752.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,451.03 : 659,970.45 = 284,728.86 : x
  2. Step 2: Convert to fraction form
    478,451.03/659,970.45 = 284,728.86/x
  3. Step 3: Cross multiply
    478,451.03x = 659,970.45 × 284,728.86
  4. Step 4: Simplify right side
    478,451.03x = 187,912,633,862.19
  5. Step 5: Solve for x
    x = 187,912,633,862.19/478,451.03
  6. Step 6: Final answer
    x = 392,752.08

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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.