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Finding the Fourth Proportional to 288,426.72, 398,036.90 and 159,373.54

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Solution

The fourth proportional to 288,426.72, 398,036.90 and 159,373.54 is: 219,939.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,426.72 : 398,036.90 = 159,373.54 : x
  2. Step 2: Convert to fraction form
    288,426.72/398,036.90 = 159,373.54/x
  3. Step 3: Cross multiply
    288,426.72x = 398,036.90 × 159,373.54
  4. Step 4: Simplify right side
    288,426.72x = 63,436,549,803.63
  5. Step 5: Solve for x
    x = 63,436,549,803.63/288,426.72
  6. Step 6: Final answer
    x = 219,939.92

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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.