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Finding the Fourth Proportional to 500,437.31, 690,652.88 and 285,609.51

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Solution

The fourth proportional to 500,437.31, 690,652.88 and 285,609.51 is: 394,169.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,437.31 : 690,652.88 = 285,609.51 : x
  2. Step 2: Convert to fraction form
    500,437.31/690,652.88 = 285,609.51/x
  3. Step 3: Cross multiply
    500,437.31x = 690,652.88 × 285,609.51
  4. Step 4: Simplify right side
    500,437.31x = 197,257,031,350.91
  5. Step 5: Solve for x
    x = 197,257,031,350.91/500,437.31
  6. Step 6: Final answer
    x = 394,169.32

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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.