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Finding the Fourth Proportional to 665,461.60, 996,442.80 and 487,002.40

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Solution

The fourth proportional to 665,461.60, 996,442.80 and 487,002.40 is: 729,223.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,461.60 : 996,442.80 = 487,002.40 : x
  2. Step 2: Convert to fraction form
    665,461.60/996,442.80 = 487,002.40/x
  3. Step 3: Cross multiply
    665,461.60x = 996,442.80 × 487,002.40
  4. Step 4: Simplify right side
    665,461.60x = 485,270,035,062.72
  5. Step 5: Solve for x
    x = 485,270,035,062.72/665,461.60
  6. Step 6: Final answer
    x = 729,223.20

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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.