Home / 638,872.65-881,739.73-409,688.72

Finding the Fourth Proportional to 638,872.65, 881,739.73 and 409,688.72

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Solution

The fourth proportional to 638,872.65, 881,739.73 and 409,688.72 is: 565,431.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,872.65 : 881,739.73 = 409,688.72 : x
  2. Step 2: Convert to fraction form
    638,872.65/881,739.73 = 409,688.72/x
  3. Step 3: Cross multiply
    638,872.65x = 881,739.73 × 409,688.72
  4. Step 4: Simplify right side
    638,872.65x = 361,238,822,536.97
  5. Step 5: Solve for x
    x = 361,238,822,536.97/638,872.65
  6. Step 6: Final answer
    x = 565,431.66

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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.