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Finding the Fourth Proportional to 461,447.60, 692,560.20 and 209,116.40

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Solution

The fourth proportional to 461,447.60, 692,560.20 and 209,116.40 is: 313,850.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,447.60 : 692,560.20 = 209,116.40 : x
  2. Step 2: Convert to fraction form
    461,447.60/692,560.20 = 209,116.40/x
  3. Step 3: Cross multiply
    461,447.60x = 692,560.20 × 209,116.40
  4. Step 4: Simplify right side
    461,447.60x = 144,825,695,807.28
  5. Step 5: Solve for x
    x = 144,825,695,807.28/461,447.60
  6. Step 6: Final answer
    x = 313,850.79

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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.