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Finding the Fourth Proportional to 391,488.80, 543,026.36 and 378,062.24

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Solution

The fourth proportional to 391,488.80, 543,026.36 and 378,062.24 is: 524,402.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,488.80 : 543,026.36 = 378,062.24 : x
  2. Step 2: Convert to fraction form
    391,488.80/543,026.36 = 378,062.24/x
  3. Step 3: Cross multiply
    391,488.80x = 543,026.36 × 378,062.24
  4. Step 4: Simplify right side
    391,488.80x = 205,297,762,040.65
  5. Step 5: Solve for x
    x = 205,297,762,040.65/391,488.80
  6. Step 6: Final answer
    x = 524,402.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.