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Finding the Fourth Proportional to 431,445.19, 647,187.23 and 165,136.63

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Solution

The fourth proportional to 431,445.19, 647,187.23 and 165,136.63 is: 247,712.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,445.19 : 647,187.23 = 165,136.63 : x
  2. Step 2: Convert to fraction form
    431,445.19/647,187.23 = 165,136.63/x
  3. Step 3: Cross multiply
    431,445.19x = 647,187.23 × 165,136.63
  4. Step 4: Simplify right side
    431,445.19x = 106,874,317,315.55
  5. Step 5: Solve for x
    x = 106,874,317,315.55/431,445.19
  6. Step 6: Final answer
    x = 247,712.39

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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.