Home / 4,307.40-6,456.78-2,920.92

Finding the Fourth Proportional to 4,307.40, 6,456.78 and 2,920.92

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Solution

The fourth proportional to 4,307.40, 6,456.78 and 2,920.92 is: 4,378.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,307.40 : 6,456.78 = 2,920.92 : x
  2. Step 2: Convert to fraction form
    4,307.40/6,456.78 = 2,920.92/x
  3. Step 3: Cross multiply
    4,307.40x = 6,456.78 × 2,920.92
  4. Step 4: Simplify right side
    4,307.40x = 18,859,737.84
  5. Step 5: Solve for x
    x = 18,859,737.84/4,307.40
  6. Step 6: Final answer
    x = 4,378.45

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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.