Home / 641,440.56-885,166.20-354,972.72

Finding the Fourth Proportional to 641,440.56, 885,166.20 and 354,972.72

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Solution

The fourth proportional to 641,440.56, 885,166.20 and 354,972.72 is: 489,850.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,440.56 : 885,166.20 = 354,972.72 : x
  2. Step 2: Convert to fraction form
    641,440.56/885,166.20 = 354,972.72/x
  3. Step 3: Cross multiply
    641,440.56x = 885,166.20 × 354,972.72
  4. Step 4: Simplify right side
    641,440.56x = 314,209,853,666.06
  5. Step 5: Solve for x
    x = 314,209,853,666.06/641,440.56
  6. Step 6: Final answer
    x = 489,850.30

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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.