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Finding the Fourth Proportional to 1,264.67, 1,894.17 and 648.80

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Solution

The fourth proportional to 1,264.67, 1,894.17 and 648.80 is: 971.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.67 : 1,894.17 = 648.80 : x
  2. Step 2: Convert to fraction form
    1,264.67/1,894.17 = 648.80/x
  3. Step 3: Cross multiply
    1,264.67x = 1,894.17 × 648.80
  4. Step 4: Simplify right side
    1,264.67x = 1,228,937.50
  5. Step 5: Solve for x
    x = 1,228,937.50/1,264.67
  6. Step 6: Final answer
    x = 971.75

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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.