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Finding the Fourth Proportional to 666,728.40, 1,000,092.60 and 267,430.80

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Solution

The fourth proportional to 666,728.40, 1,000,092.60 and 267,430.80 is: 401,146.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,728.40 : 1,000,092.60 = 267,430.80 : x
  2. Step 2: Convert to fraction form
    666,728.40/1,000,092.60 = 267,430.80/x
  3. Step 3: Cross multiply
    666,728.40x = 1,000,092.60 × 267,430.80
  4. Step 4: Simplify right side
    666,728.40x = 267,455,564,092.08
  5. Step 5: Solve for x
    x = 267,455,564,092.08/666,728.40
  6. Step 6: Final answer
    x = 401,146.20

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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.