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Finding the Fourth Proportional to 328,326.70, 492,402.48 and 91,627.78

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Solution

The fourth proportional to 328,326.70, 492,402.48 and 91,627.78 is: 137,417.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,326.70 : 492,402.48 = 91,627.78 : x
  2. Step 2: Convert to fraction form
    328,326.70/492,402.48 = 91,627.78/x
  3. Step 3: Cross multiply
    328,326.70x = 492,402.48 × 91,627.78
  4. Step 4: Simplify right side
    328,326.70x = 45,117,746,108.89
  5. Step 5: Solve for x
    x = 45,117,746,108.89/328,326.70
  6. Step 6: Final answer
    x = 137,417.23

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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.