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Finding the Fourth Proportional to 618,593.76, 855,377.28 and 491,048.16

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Solution

The fourth proportional to 618,593.76, 855,377.28 and 491,048.16 is: 679,010.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,593.76 : 855,377.28 = 491,048.16 : x
  2. Step 2: Convert to fraction form
    618,593.76/855,377.28 = 491,048.16/x
  3. Step 3: Cross multiply
    618,593.76x = 855,377.28 × 491,048.16
  4. Step 4: Simplify right side
    618,593.76x = 420,031,439,449.81
  5. Step 5: Solve for x
    x = 420,031,439,449.81/618,593.76
  6. Step 6: Final answer
    x = 679,010.15

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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.