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Finding the Fourth Proportional to 500,381.82, 690,517.04 and 285,487.20

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Solution

The fourth proportional to 500,381.82, 690,517.04 and 285,487.20 is: 393,966.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,381.82 : 690,517.04 = 285,487.20 : x
  2. Step 2: Convert to fraction form
    500,381.82/690,517.04 = 285,487.20/x
  3. Step 3: Cross multiply
    500,381.82x = 690,517.04 × 285,487.20
  4. Step 4: Simplify right side
    500,381.82x = 197,133,774,874.45
  5. Step 5: Solve for x
    x = 197,133,774,874.45/500,381.82
  6. Step 6: Final answer
    x = 393,966.70

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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.