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Finding the Fourth Proportional to 515,128.53, 710,921.03 and 285,759.72

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Solution

The fourth proportional to 515,128.53, 710,921.03 and 285,759.72 is: 394,372.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,128.53 : 710,921.03 = 285,759.72 : x
  2. Step 2: Convert to fraction form
    515,128.53/710,921.03 = 285,759.72/x
  3. Step 3: Cross multiply
    515,128.53x = 710,921.03 × 285,759.72
  4. Step 4: Simplify right side
    515,128.53x = 203,152,594,474.91
  5. Step 5: Solve for x
    x = 203,152,594,474.91/515,128.53
  6. Step 6: Final answer
    x = 394,372.63

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1.5x scale

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.