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Finding the Fourth Proportional to 371,685.90, 557,550 and 105,425.40

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Solution

The fourth proportional to 371,685.90, 557,550 and 105,425.40 is: 158,144.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,685.90 : 557,550 = 105,425.40 : x
  2. Step 2: Convert to fraction form
    371,685.90/557,550 = 105,425.40/x
  3. Step 3: Cross multiply
    371,685.90x = 557,550 × 105,425.40
  4. Step 4: Simplify right side
    371,685.90x = 58,779,931,770
  5. Step 5: Solve for x
    x = 58,779,931,770/371,685.90
  6. Step 6: Final answer
    x = 158,144.10

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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.