Home / 642,278.23-886,116.71-383,975.91

Finding the Fourth Proportional to 642,278.23, 886,116.71 and 383,975.91

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Solution

The fourth proportional to 642,278.23, 886,116.71 and 383,975.91 is: 529,750.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,278.23 : 886,116.71 = 383,975.91 : x
  2. Step 2: Convert to fraction form
    642,278.23/886,116.71 = 383,975.91/x
  3. Step 3: Cross multiply
    642,278.23x = 886,116.71 × 383,975.91
  4. Step 4: Simplify right side
    642,278.23x = 340,247,471,048.40
  5. Step 5: Solve for x
    x = 340,247,471,048.40/642,278.23
  6. Step 6: Final answer
    x = 529,750.90

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Double scale
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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.