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Finding the Fourth Proportional to 215,560.56, 297,479.58 and 129,490.58

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Solution

The fourth proportional to 215,560.56, 297,479.58 and 129,490.58 is: 178,700.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,560.56 : 297,479.58 = 129,490.58 : x
  2. Step 2: Convert to fraction form
    215,560.56/297,479.58 = 129,490.58/x
  3. Step 3: Cross multiply
    215,560.56x = 297,479.58 × 129,490.58
  4. Step 4: Simplify right side
    215,560.56x = 38,520,803,352.36
  5. Step 5: Solve for x
    x = 38,520,803,352.36/215,560.56
  6. Step 6: Final answer
    x = 178,700.61

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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.