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Finding the Fourth Proportional to 326,136.60, 488,548.80 and 185,731.20

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Solution

The fourth proportional to 326,136.60, 488,548.80 and 185,731.20 is: 278,223.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,136.60 : 488,548.80 = 185,731.20 : x
  2. Step 2: Convert to fraction form
    326,136.60/488,548.80 = 185,731.20/x
  3. Step 3: Cross multiply
    326,136.60x = 488,548.80 × 185,731.20
  4. Step 4: Simplify right side
    326,136.60x = 90,738,754,882.56
  5. Step 5: Solve for x
    x = 90,738,754,882.56/326,136.60
  6. Step 6: Final answer
    x = 278,223.16

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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.