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Finding the Fourth Proportional to 660,437.75, 911,407.68 and 374,013.65

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Solution

The fourth proportional to 660,437.75, 911,407.68 and 374,013.65 is: 516,140.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,437.75 : 911,407.68 = 374,013.65 : x
  2. Step 2: Convert to fraction form
    660,437.75/911,407.68 = 374,013.65/x
  3. Step 3: Cross multiply
    660,437.75x = 911,407.68 × 374,013.65
  4. Step 4: Simplify right side
    660,437.75x = 340,878,915,313.35
  5. Step 5: Solve for x
    x = 340,878,915,313.35/660,437.75
  6. Step 6: Final answer
    x = 516,140.87

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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.