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Finding the Fourth Proportional to 625,534.94, 863,330.45 and 396,113.18

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Solution

The fourth proportional to 625,534.94, 863,330.45 and 396,113.18 is: 546,694.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,534.94 : 863,330.45 = 396,113.18 : x
  2. Step 2: Convert to fraction form
    625,534.94/863,330.45 = 396,113.18/x
  3. Step 3: Cross multiply
    625,534.94x = 863,330.45 × 396,113.18
  4. Step 4: Simplify right side
    625,534.94x = 341,976,563,643.11
  5. Step 5: Solve for x
    x = 341,976,563,643.11/625,534.94
  6. Step 6: Final answer
    x = 546,694.59

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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.