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Finding the Fourth Proportional to 647,059.70, 970,589.55 and 423,110.90

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Solution

The fourth proportional to 647,059.70, 970,589.55 and 423,110.90 is: 634,666.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,059.70 : 970,589.55 = 423,110.90 : x
  2. Step 2: Convert to fraction form
    647,059.70/970,589.55 = 423,110.90/x
  3. Step 3: Cross multiply
    647,059.70x = 970,589.55 × 423,110.90
  4. Step 4: Simplify right side
    647,059.70x = 410,667,018,031.10
  5. Step 5: Solve for x
    x = 410,667,018,031.10/647,059.70
  6. Step 6: Final answer
    x = 634,666.35

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Double scale
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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.