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Finding the Fourth Proportional to 515,490.89, 711,381.39 and 286,049.07

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Solution

The fourth proportional to 515,490.89, 711,381.39 and 286,049.07 is: 394,749.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,490.89 : 711,381.39 = 286,049.07 : x
  2. Step 2: Convert to fraction form
    515,490.89/711,381.39 = 286,049.07/x
  3. Step 3: Cross multiply
    515,490.89x = 711,381.39 × 286,049.07
  4. Step 4: Simplify right side
    515,490.89x = 203,489,983,952.12
  5. Step 5: Solve for x
    x = 203,489,983,952.12/515,490.89
  6. Step 6: Final answer
    x = 394,749.92

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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.