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Finding the Fourth Proportional to 315,691.96, 435,649.44 and 172,448.32

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Solution

The fourth proportional to 315,691.96, 435,649.44 and 172,448.32 is: 237,975.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,691.96 : 435,649.44 = 172,448.32 : x
  2. Step 2: Convert to fraction form
    315,691.96/435,649.44 = 172,448.32/x
  3. Step 3: Cross multiply
    315,691.96x = 435,649.44 × 172,448.32
  4. Step 4: Simplify right side
    315,691.96x = 75,127,014,036.94
  5. Step 5: Solve for x
    x = 75,127,014,036.94/315,691.96
  6. Step 6: Final answer
    x = 237,975.70

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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.