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Finding the Fourth Proportional to 478,781.28, 660,720.33 and 263,916.72

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Solution

The fourth proportional to 478,781.28, 660,720.33 and 263,916.72 is: 364,206.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,781.28 : 660,720.33 = 263,916.72 : x
  2. Step 2: Convert to fraction form
    478,781.28/660,720.33 = 263,916.72/x
  3. Step 3: Cross multiply
    478,781.28x = 660,720.33 × 263,916.72
  4. Step 4: Simplify right side
    478,781.28x = 174,375,142,330.92
  5. Step 5: Solve for x
    x = 174,375,142,330.92/478,781.28
  6. Step 6: Final answer
    x = 364,206.27

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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.