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Finding the Fourth Proportional to 6,289.90, 8,680.71 and 4,298.92

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Solution

The fourth proportional to 6,289.90, 8,680.71 and 4,298.92 is: 5,932.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,289.90 : 8,680.71 = 4,298.92 : x
  2. Step 2: Convert to fraction form
    6,289.90/8,680.71 = 4,298.92/x
  3. Step 3: Cross multiply
    6,289.90x = 8,680.71 × 4,298.92
  4. Step 4: Simplify right side
    6,289.90x = 37,317,677.83
  5. Step 5: Solve for x
    x = 37,317,677.83/6,289.90
  6. Step 6: Final answer
    x = 5,932.95

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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.