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Finding the Fourth Proportional to 2,378.64, 3,567.95 and 647.27

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Solution

The fourth proportional to 2,378.64, 3,567.95 and 647.27 is: 970.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,378.64 : 3,567.95 = 647.27 : x
  2. Step 2: Convert to fraction form
    2,378.64/3,567.95 = 647.27/x
  3. Step 3: Cross multiply
    2,378.64x = 3,567.95 × 647.27
  4. Step 4: Simplify right side
    2,378.64x = 2,309,427.00
  5. Step 5: Solve for x
    x = 2,309,427.00/2,378.64
  6. Step 6: Final answer
    x = 970.90

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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.