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Finding the Fourth Proportional to 847.63, 1,270.95 and 745.12

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Solution

The fourth proportional to 847.63, 1,270.95 and 745.12 is: 1,117.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.63 : 1,270.95 = 745.12 : x
  2. Step 2: Convert to fraction form
    847.63/1,270.95 = 745.12/x
  3. Step 3: Cross multiply
    847.63x = 1,270.95 × 745.12
  4. Step 4: Simplify right side
    847.63x = 947,010.26
  5. Step 5: Solve for x
    x = 947,010.26/847.63
  6. Step 6: Final answer
    x = 1,117.24

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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.