Home / 315,905.68-435,961.56-172,675.36

Finding the Fourth Proportional to 315,905.68, 435,961.56 and 172,675.36

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Solution

The fourth proportional to 315,905.68, 435,961.56 and 172,675.36 is: 238,298.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,905.68 : 435,961.56 = 172,675.36 : x
  2. Step 2: Convert to fraction form
    315,905.68/435,961.56 = 172,675.36/x
  3. Step 3: Cross multiply
    315,905.68x = 435,961.56 × 172,675.36
  4. Step 4: Simplify right side
    315,905.68x = 75,279,819,319.16
  5. Step 5: Solve for x
    x = 75,279,819,319.16/315,905.68
  6. Step 6: Final answer
    x = 238,298.40

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1.5x scale

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.