Home / 638,990.64-881,416.35-409,470.66

Finding the Fourth Proportional to 638,990.64, 881,416.35 and 409,470.66

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Solution

The fourth proportional to 638,990.64, 881,416.35 and 409,470.66 is: 564,819.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,990.64 : 881,416.35 = 409,470.66 : x
  2. Step 2: Convert to fraction form
    638,990.64/881,416.35 = 409,470.66/x
  3. Step 3: Cross multiply
    638,990.64x = 881,416.35 × 409,470.66
  4. Step 4: Simplify right side
    638,990.64x = 360,914,134,569.29
  5. Step 5: Solve for x
    x = 360,914,134,569.29/638,990.64
  6. Step 6: Final answer
    x = 564,819.13

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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.