Home / 4,307.42-6,456.78-2,920.90

Finding the Fourth Proportional to 4,307.42, 6,456.78 and 2,920.90

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Solution

The fourth proportional to 4,307.42, 6,456.78 and 2,920.90 is: 4,378.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,307.42 : 6,456.78 = 2,920.90 : x
  2. Step 2: Convert to fraction form
    4,307.42/6,456.78 = 2,920.90/x
  3. Step 3: Cross multiply
    4,307.42x = 6,456.78 × 2,920.90
  4. Step 4: Simplify right side
    4,307.42x = 18,859,608.70
  5. Step 5: Solve for x
    x = 18,859,608.70/4,307.42
  6. Step 6: Final answer
    x = 4,378.40

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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.