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Finding the Fourth Proportional to 486,076.40, 729,114.60 and 307,617.20

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Solution

The fourth proportional to 486,076.40, 729,114.60 and 307,617.20 is: 461,425.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,076.40 : 729,114.60 = 307,617.20 : x
  2. Step 2: Convert to fraction form
    486,076.40/729,114.60 = 307,617.20/x
  3. Step 3: Cross multiply
    486,076.40x = 729,114.60 × 307,617.20
  4. Step 4: Simplify right side
    486,076.40x = 224,288,191,731.12
  5. Step 5: Solve for x
    x = 224,288,191,731.12/486,076.40
  6. Step 6: Final answer
    x = 461,425.80

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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.