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Finding the Fourth Proportional to 329,176.80, 493,765.20 and 129,430.80

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Solution

The fourth proportional to 329,176.80, 493,765.20 and 129,430.80 is: 194,146.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,176.80 : 493,765.20 = 129,430.80 : x
  2. Step 2: Convert to fraction form
    329,176.80/493,765.20 = 129,430.80/x
  3. Step 3: Cross multiply
    329,176.80x = 493,765.20 × 129,430.80
  4. Step 4: Simplify right side
    329,176.80x = 63,908,424,848.16
  5. Step 5: Solve for x
    x = 63,908,424,848.16/329,176.80
  6. Step 6: Final answer
    x = 194,146.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.