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Finding the Fourth Proportional to 429,416.32, 644,147.02 and 129,889.26

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Solution

The fourth proportional to 429,416.32, 644,147.02 and 129,889.26 is: 194,840.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,416.32 : 644,147.02 = 129,889.26 : x
  2. Step 2: Convert to fraction form
    429,416.32/644,147.02 = 129,889.26/x
  3. Step 3: Cross multiply
    429,416.32x = 644,147.02 × 129,889.26
  4. Step 4: Simplify right side
    429,416.32x = 83,667,779,759.01
  5. Step 5: Solve for x
    x = 83,667,779,759.01/429,416.32
  6. Step 6: Final answer
    x = 194,840.71

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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.