Home / 645,178.26-890,295.57-358,680.90

Finding the Fourth Proportional to 645,178.26, 890,295.57 and 358,680.90

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Solution

The fourth proportional to 645,178.26, 890,295.57 and 358,680.90 is: 494,951.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,178.26 : 890,295.57 = 358,680.90 : x
  2. Step 2: Convert to fraction form
    645,178.26/890,295.57 = 358,680.90/x
  3. Step 3: Cross multiply
    645,178.26x = 890,295.57 × 358,680.90
  4. Step 4: Simplify right side
    645,178.26x = 319,332,016,313.61
  5. Step 5: Solve for x
    x = 319,332,016,313.61/645,178.26
  6. Step 6: Final answer
    x = 494,951.61

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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.