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Finding the Fourth Proportional to 515,508.64, 711,365.52 and 286,077.76

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Solution

The fourth proportional to 515,508.64, 711,365.52 and 286,077.76 is: 394,767.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,508.64 : 711,365.52 = 286,077.76 : x
  2. Step 2: Convert to fraction form
    515,508.64/711,365.52 = 286,077.76/x
  3. Step 3: Cross multiply
    515,508.64x = 711,365.52 × 286,077.76
  4. Step 4: Simplify right side
    515,508.64x = 203,505,854,502.84
  5. Step 5: Solve for x
    x = 203,505,854,502.84/515,508.64
  6. Step 6: Final answer
    x = 394,767.11

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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.