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Finding the Fourth Proportional to 648.55, 968.21 and 625.77

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Solution

The fourth proportional to 648.55, 968.21 and 625.77 is: 934.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    648.55 : 968.21 = 625.77 : x
  2. Step 2: Convert to fraction form
    648.55/968.21 = 625.77/x
  3. Step 3: Cross multiply
    648.55x = 968.21 × 625.77
  4. Step 4: Simplify right side
    648.55x = 605,875.99
  5. Step 5: Solve for x
    x = 605,875.99/648.55
  6. Step 6: Final answer
    x = 934.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.