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Finding the Fourth Proportional to 285,752.68, 393,438.90 and 217,550.68

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Solution

The fourth proportional to 285,752.68, 393,438.90 and 217,550.68 is: 299,534.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,752.68 : 393,438.90 = 217,550.68 : x
  2. Step 2: Convert to fraction form
    285,752.68/393,438.90 = 217,550.68/x
  3. Step 3: Cross multiply
    285,752.68x = 393,438.90 × 217,550.68
  4. Step 4: Simplify right side
    285,752.68x = 85,592,900,233.45
  5. Step 5: Solve for x
    x = 85,592,900,233.45/285,752.68
  6. Step 6: Final answer
    x = 299,534.90

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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.