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Finding the Fourth Proportional to 288,718.32, 398,432.88 and 161,399.28

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Solution

The fourth proportional to 288,718.32, 398,432.88 and 161,399.28 is: 222,731.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,718.32 : 398,432.88 = 161,399.28 : x
  2. Step 2: Convert to fraction form
    288,718.32/398,432.88 = 161,399.28/x
  3. Step 3: Cross multiply
    288,718.32x = 398,432.88 × 161,399.28
  4. Step 4: Simplify right side
    288,718.32x = 64,306,779,960.33
  5. Step 5: Solve for x
    x = 64,306,779,960.33/288,718.32
  6. Step 6: Final answer
    x = 222,731.90

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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.