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Finding the Fourth Proportional to 231,340.32, 319,155.12 and 155,913.12

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Solution

The fourth proportional to 231,340.32, 319,155.12 and 155,913.12 is: 215,096.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,340.32 : 319,155.12 = 155,913.12 : x
  2. Step 2: Convert to fraction form
    231,340.32/319,155.12 = 155,913.12/x
  3. Step 3: Cross multiply
    231,340.32x = 319,155.12 × 155,913.12
  4. Step 4: Simplify right side
    231,340.32x = 49,760,470,523.17
  5. Step 5: Solve for x
    x = 49,760,470,523.17/231,340.32
  6. Step 6: Final answer
    x = 215,096.40

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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.