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Finding the Fourth Proportional to 315,938.56, 435,996.08 and 172,700.32

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Solution

The fourth proportional to 315,938.56, 435,996.08 and 172,700.32 is: 238,326.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,938.56 : 435,996.08 = 172,700.32 : x
  2. Step 2: Convert to fraction form
    315,938.56/435,996.08 = 172,700.32/x
  3. Step 3: Cross multiply
    315,938.56x = 435,996.08 × 172,700.32
  4. Step 4: Simplify right side
    315,938.56x = 75,296,662,534.75
  5. Step 5: Solve for x
    x = 75,296,662,534.75/315,938.56
  6. Step 6: Final answer
    x = 238,326.92

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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.