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Finding the Fourth Proportional to 847.30, 1,269.76 and 730.95

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Solution

The fourth proportional to 847.30, 1,269.76 and 730.95 is: 1,095.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.30 : 1,269.76 = 730.95 : x
  2. Step 2: Convert to fraction form
    847.30/1,269.76 = 730.95/x
  3. Step 3: Cross multiply
    847.30x = 1,269.76 × 730.95
  4. Step 4: Simplify right side
    847.30x = 928,131.07
  5. Step 5: Solve for x
    x = 928,131.07/847.30
  6. Step 6: Final answer
    x = 1,095.40

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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.