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Finding the Fourth Proportional to 948.84, 1,308.93 and 617.46

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Solution

The fourth proportional to 948.84, 1,308.93 and 617.46 is: 851.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.84 : 1,308.93 = 617.46 : x
  2. Step 2: Convert to fraction form
    948.84/1,308.93 = 617.46/x
  3. Step 3: Cross multiply
    948.84x = 1,308.93 × 617.46
  4. Step 4: Simplify right side
    948.84x = 808,211.92
  5. Step 5: Solve for x
    x = 808,211.92/948.84
  6. Step 6: Final answer
    x = 851.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.