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Finding the Fourth Proportional to 660,344.87, 911,279.55 and 358,538.87

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Solution

The fourth proportional to 660,344.87, 911,279.55 and 358,538.87 is: 494,785.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,344.87 : 911,279.55 = 358,538.87 : x
  2. Step 2: Convert to fraction form
    660,344.87/911,279.55 = 358,538.87/x
  3. Step 3: Cross multiply
    660,344.87x = 911,279.55 × 358,538.87
  4. Step 4: Simplify right side
    660,344.87x = 326,729,135,554.71
  5. Step 5: Solve for x
    x = 326,729,135,554.71/660,344.87
  6. Step 6: Final answer
    x = 494,785.61

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1.5x scale

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.