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Finding the Fourth Proportional to 315,755.04, 435,729 and 172,520

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Solution

The fourth proportional to 315,755.04, 435,729 and 172,520 is: 238,070.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,755.04 : 435,729 = 172,520 : x
  2. Step 2: Convert to fraction form
    315,755.04/435,729 = 172,520/x
  3. Step 3: Cross multiply
    315,755.04x = 435,729 × 172,520
  4. Step 4: Simplify right side
    315,755.04x = 75,171,967,080
  5. Step 5: Solve for x
    x = 75,171,967,080/315,755.04
  6. Step 6: Final answer
    x = 238,070.52

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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.