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Finding the Fourth Proportional to 315,296.28, 435,118.12 and 172,065.56

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Solution

The fourth proportional to 315,296.28, 435,118.12 and 172,065.56 is: 237,455.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,296.28 : 435,118.12 = 172,065.56 : x
  2. Step 2: Convert to fraction form
    315,296.28/435,118.12 = 172,065.56/x
  3. Step 3: Cross multiply
    315,296.28x = 435,118.12 × 172,065.56
  4. Step 4: Simplify right side
    315,296.28x = 74,868,842,983.95
  5. Step 5: Solve for x
    x = 74,868,842,983.95/315,296.28
  6. Step 6: Final answer
    x = 237,455.52

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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.