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Finding the Fourth Proportional to 371,445.40, 557,171.30 and 105,211.80

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Solution

The fourth proportional to 371,445.40, 557,171.30 and 105,211.80 is: 157,818.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,445.40 : 557,171.30 = 105,211.80 : x
  2. Step 2: Convert to fraction form
    371,445.40/557,171.30 = 105,211.80/x
  3. Step 3: Cross multiply
    371,445.40x = 557,171.30 × 105,211.80
  4. Step 4: Simplify right side
    371,445.40x = 58,620,995,381.34
  5. Step 5: Solve for x
    x = 58,620,995,381.34/371,445.40
  6. Step 6: Final answer
    x = 157,818.61

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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.