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Finding the Fourth Proportional to 660,757.60, 911,800.56 and 358,945.12

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Solution

The fourth proportional to 660,757.60, 911,800.56 and 358,945.12 is: 495,319.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,757.60 : 911,800.56 = 358,945.12 : x
  2. Step 2: Convert to fraction form
    660,757.60/911,800.56 = 358,945.12/x
  3. Step 3: Cross multiply
    660,757.60x = 911,800.56 × 358,945.12
  4. Step 4: Simplify right side
    660,757.60x = 327,286,361,425.27
  5. Step 5: Solve for x
    x = 327,286,361,425.27/660,757.60
  6. Step 6: Final answer
    x = 495,319.86

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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.