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Finding the Fourth Proportional to 660,346.87, 911,282.31 and 358,540.87

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Solution

The fourth proportional to 660,346.87, 911,282.31 and 358,540.87 is: 494,788.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,346.87 : 911,282.31 = 358,540.87 : x
  2. Step 2: Convert to fraction form
    660,346.87/911,282.31 = 358,540.87/x
  3. Step 3: Cross multiply
    660,346.87x = 911,282.31 × 358,540.87
  4. Step 4: Simplify right side
    660,346.87x = 326,731,952,243.01
  5. Step 5: Solve for x
    x = 326,731,952,243.01/660,346.87
  6. Step 6: Final answer
    x = 494,788.37

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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.