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Finding the Fourth Proportional to 491,840.20, 678,752.13 and 276,987.70

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Solution

The fourth proportional to 491,840.20, 678,752.13 and 276,987.70 is: 382,250.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,840.20 : 678,752.13 = 276,987.70 : x
  2. Step 2: Convert to fraction form
    491,840.20/678,752.13 = 276,987.70/x
  3. Step 3: Cross multiply
    491,840.20x = 678,752.13 × 276,987.70
  4. Step 4: Simplify right side
    491,840.20x = 188,005,991,358.80
  5. Step 5: Solve for x
    x = 188,005,991,358.80/491,840.20
  6. Step 6: Final answer
    x = 382,250.15

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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.