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Finding the Fourth Proportional to 289,337.31, 399,319.61 and 161,988.30

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Solution

The fourth proportional to 289,337.31, 399,319.61 and 161,988.30 is: 223,562.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,337.31 : 399,319.61 = 161,988.30 : x
  2. Step 2: Convert to fraction form
    289,337.31/399,319.61 = 161,988.30/x
  3. Step 3: Cross multiply
    289,337.31x = 399,319.61 × 161,988.30
  4. Step 4: Simplify right side
    289,337.31x = 64,685,103,970.62
  5. Step 5: Solve for x
    x = 64,685,103,970.62/289,337.31
  6. Step 6: Final answer
    x = 223,562.95

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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.