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Finding the Fourth Proportional to 647,087.70, 970,631.55 and 173,820.90

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Solution

The fourth proportional to 647,087.70, 970,631.55 and 173,820.90 is: 260,731.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,087.70 : 970,631.55 = 173,820.90 : x
  2. Step 2: Convert to fraction form
    647,087.70/970,631.55 = 173,820.90/x
  3. Step 3: Cross multiply
    647,087.70x = 970,631.55 × 173,820.90
  4. Step 4: Simplify right side
    647,087.70x = 168,716,049,589.40
  5. Step 5: Solve for x
    x = 168,716,049,589.40/647,087.70
  6. Step 6: Final answer
    x = 260,731.35

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.