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Finding the Fourth Proportional to 515,755.55, 711,731.39 and 286,299.42

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Solution

The fourth proportional to 515,755.55, 711,731.39 and 286,299.42 is: 395,086.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,755.55 : 711,731.39 = 286,299.42 : x
  2. Step 2: Convert to fraction form
    515,755.55/711,731.39 = 286,299.42/x
  3. Step 3: Cross multiply
    515,755.55x = 711,731.39 × 286,299.42
  4. Step 4: Simplify right side
    515,755.55x = 203,768,282,721.30
  5. Step 5: Solve for x
    x = 203,768,282,721.30/515,755.55
  6. Step 6: Final answer
    x = 395,086.95

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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.