Home / 638,721.88-958,236.72-239,366.20

Finding the Fourth Proportional to 638,721.88, 958,236.72 and 239,366.20

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Solution

The fourth proportional to 638,721.88, 958,236.72 and 239,366.20 is: 359,106.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,721.88 : 958,236.72 = 239,366.20 : x
  2. Step 2: Convert to fraction form
    638,721.88/958,236.72 = 239,366.20/x
  3. Step 3: Cross multiply
    638,721.88x = 958,236.72 × 239,366.20
  4. Step 4: Simplify right side
    638,721.88x = 229,369,482,366.86
  5. Step 5: Solve for x
    x = 229,369,482,366.86/638,721.88
  6. Step 6: Final answer
    x = 359,106.98

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Double scale
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Similar ratio
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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.