Home / 4,218.40-6,332.80-2,658.40

Finding the Fourth Proportional to 4,218.40, 6,332.80 and 2,658.40

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Solution

The fourth proportional to 4,218.40, 6,332.80 and 2,658.40 is: 3,990.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,218.40 : 6,332.80 = 2,658.40 : x
  2. Step 2: Convert to fraction form
    4,218.40/6,332.80 = 2,658.40/x
  3. Step 3: Cross multiply
    4,218.40x = 6,332.80 × 2,658.40
  4. Step 4: Simplify right side
    4,218.40x = 16,835,115.52
  5. Step 5: Solve for x
    x = 16,835,115.52/4,218.40
  6. Step 6: Final answer
    x = 3,990.88

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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.