Home / 638,631.16-880,981.18-396,821.88

Finding the Fourth Proportional to 638,631.16, 880,981.18 and 396,821.88

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Solution

The fourth proportional to 638,631.16, 880,981.18 and 396,821.88 is: 547,409.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,631.16 : 880,981.18 = 396,821.88 : x
  2. Step 2: Convert to fraction form
    638,631.16/880,981.18 = 396,821.88/x
  3. Step 3: Cross multiply
    638,631.16x = 880,981.18 × 396,821.88
  4. Step 4: Simplify right side
    638,631.16x = 349,592,608,092.22
  5. Step 5: Solve for x
    x = 349,592,608,092.22/638,631.16
  6. Step 6: Final answer
    x = 547,409.26

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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.