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Finding the Fourth Proportional to 4,328.80, 6,478.80 and 3,810.40

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Solution

The fourth proportional to 4,328.80, 6,478.80 and 3,810.40 is: 5,702.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,328.80 : 6,478.80 = 3,810.40 : x
  2. Step 2: Convert to fraction form
    4,328.80/6,478.80 = 3,810.40/x
  3. Step 3: Cross multiply
    4,328.80x = 6,478.80 × 3,810.40
  4. Step 4: Simplify right side
    4,328.80x = 24,686,819.52
  5. Step 5: Solve for x
    x = 24,686,819.52/4,328.80
  6. Step 6: Final answer
    x = 5,702.92

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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.