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Finding the Fourth Proportional to 6,492.80, 8,955.84 and 3,840

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Solution

The fourth proportional to 6,492.80, 8,955.84 and 3,840 is: 5,296.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,492.80 : 8,955.84 = 3,840 : x
  2. Step 2: Convert to fraction form
    6,492.80/8,955.84 = 3,840/x
  3. Step 3: Cross multiply
    6,492.80x = 8,955.84 × 3,840
  4. Step 4: Simplify right side
    6,492.80x = 34,390,425.60
  5. Step 5: Solve for x
    x = 34,390,425.60/6,492.80
  6. Step 6: Final answer
    x = 5,296.70

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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.