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Finding the Fourth Proportional to 358,981.76, 495,291.76 and 231,729.76

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Solution

The fourth proportional to 358,981.76, 495,291.76 and 231,729.76 is: 319,720.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,981.76 : 495,291.76 = 231,729.76 : x
  2. Step 2: Convert to fraction form
    358,981.76/495,291.76 = 231,729.76/x
  3. Step 3: Cross multiply
    358,981.76x = 495,291.76 × 231,729.76
  4. Step 4: Simplify right side
    358,981.76x = 114,773,840,674.78
  5. Step 5: Solve for x
    x = 114,773,840,674.78/358,981.76
  6. Step 6: Final answer
    x = 319,720.54

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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.