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Finding the Fourth Proportional to 429,756.25, 644,562.88 and 130,165.60

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Solution

The fourth proportional to 429,756.25, 644,562.88 and 130,165.60 is: 195,226.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,756.25 : 644,562.88 = 130,165.60 : x
  2. Step 2: Convert to fraction form
    429,756.25/644,562.88 = 130,165.60/x
  3. Step 3: Cross multiply
    429,756.25x = 644,562.88 × 130,165.60
  4. Step 4: Simplify right side
    429,756.25x = 83,899,914,012.93
  5. Step 5: Solve for x
    x = 83,899,914,012.93/429,756.25
  6. Step 6: Final answer
    x = 195,226.75

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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.