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Finding the Fourth Proportional to 315,841.02, 435,861.75 and 172,603.26

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Solution

The fourth proportional to 315,841.02, 435,861.75 and 172,603.26 is: 238,193.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,841.02 : 435,861.75 = 172,603.26 : x
  2. Step 2: Convert to fraction form
    315,841.02/435,861.75 = 172,603.26/x
  3. Step 3: Cross multiply
    315,841.02x = 435,861.75 × 172,603.26
  4. Step 4: Simplify right side
    315,841.02x = 75,231,158,959.31
  5. Step 5: Solve for x
    x = 75,231,158,959.31/315,841.02
  6. Step 6: Final answer
    x = 238,193.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.