Home / 639,320.52-958,981.26-218,599.56

Finding the Fourth Proportional to 639,320.52, 958,981.26 and 218,599.56

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Solution

The fourth proportional to 639,320.52, 958,981.26 and 218,599.56 is: 327,899.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,320.52 : 958,981.26 = 218,599.56 : x
  2. Step 2: Convert to fraction form
    639,320.52/958,981.26 = 218,599.56/x
  3. Step 3: Cross multiply
    639,320.52x = 958,981.26 × 218,599.56
  4. Step 4: Simplify right side
    639,320.52x = 209,632,881,484.25
  5. Step 5: Solve for x
    x = 209,632,881,484.25/639,320.52
  6. Step 6: Final answer
    x = 327,899.50

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.