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Finding the Fourth Proportional to 660,689.76, 911,815.68 and 370,350.46

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Solution

The fourth proportional to 660,689.76, 911,815.68 and 370,350.46 is: 511,119.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,689.76 : 911,815.68 = 370,350.46 : x
  2. Step 2: Convert to fraction form
    660,689.76/911,815.68 = 370,350.46/x
  3. Step 3: Cross multiply
    660,689.76x = 911,815.68 × 370,350.46
  4. Step 4: Simplify right side
    660,689.76x = 337,691,359,051.80
  5. Step 5: Solve for x
    x = 337,691,359,051.80/660,689.76
  6. Step 6: Final answer
    x = 511,119.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.