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Finding the Fourth Proportional to 315,527.36, 435,425.48 and 172,287.28

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Solution

The fourth proportional to 315,527.36, 435,425.48 and 172,287.28 is: 237,755.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,527.36 : 435,425.48 = 172,287.28 : x
  2. Step 2: Convert to fraction form
    315,527.36/435,425.48 = 172,287.28/x
  3. Step 3: Cross multiply
    315,527.36x = 435,425.48 × 172,287.28
  4. Step 4: Simplify right side
    315,527.36x = 75,018,271,591.89
  5. Step 5: Solve for x
    x = 75,018,271,591.89/315,527.36
  6. Step 6: Final answer
    x = 237,755.20

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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.