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Finding the Fourth Proportional to 515,127.53, 710,919.65 and 285,758.72

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Solution

The fourth proportional to 515,127.53, 710,919.65 and 285,758.72 is: 394,371.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,127.53 : 710,919.65 = 285,758.72 : x
  2. Step 2: Convert to fraction form
    515,127.53/710,919.65 = 285,758.72/x
  3. Step 3: Cross multiply
    515,127.53x = 710,919.65 × 285,758.72
  4. Step 4: Simplify right side
    515,127.53x = 203,151,487,909.74
  5. Step 5: Solve for x
    x = 203,151,487,909.74/515,127.53
  6. Step 6: Final answer
    x = 394,371.25

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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.