Home / 656,568.38-905,910.08-398,439.51

Finding the Fourth Proportional to 656,568.38, 905,910.08 and 398,439.51

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Solution

The fourth proportional to 656,568.38, 905,910.08 and 398,439.51 is: 549,752.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,568.38 : 905,910.08 = 398,439.51 : x
  2. Step 2: Convert to fraction form
    656,568.38/905,910.08 = 398,439.51/x
  3. Step 3: Cross multiply
    656,568.38x = 905,910.08 × 398,439.51
  4. Step 4: Simplify right side
    656,568.38x = 360,950,362,989.90
  5. Step 5: Solve for x
    x = 360,950,362,989.90/656,568.38
  6. Step 6: Final answer
    x = 549,752.89

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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.