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Finding the Fourth Proportional to 561,195.20, 774,257.28 and 319,417.28

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Solution

The fourth proportional to 561,195.20, 774,257.28 and 319,417.28 is: 440,686.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,195.20 : 774,257.28 = 319,417.28 : x
  2. Step 2: Convert to fraction form
    561,195.20/774,257.28 = 319,417.28/x
  3. Step 3: Cross multiply
    561,195.20x = 774,257.28 × 319,417.28
  4. Step 4: Simplify right side
    561,195.20x = 247,311,154,397.80
  5. Step 5: Solve for x
    x = 247,311,154,397.80/561,195.20
  6. Step 6: Final answer
    x = 440,686.51

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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.