Home / 638,873.65-881,741.11-409,689.72

Finding the Fourth Proportional to 638,873.65, 881,741.11 and 409,689.72

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Solution

The fourth proportional to 638,873.65, 881,741.11 and 409,689.72 is: 565,433.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,873.65 : 881,741.11 = 409,689.72 : x
  2. Step 2: Convert to fraction form
    638,873.65/881,741.11 = 409,689.72/x
  3. Step 3: Cross multiply
    638,873.65x = 881,741.11 × 409,689.72
  4. Step 4: Simplify right side
    638,873.65x = 361,240,268,468.39
  5. Step 5: Solve for x
    x = 361,240,268,468.39/638,873.65
  6. Step 6: Final answer
    x = 565,433.04

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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.