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Finding the Fourth Proportional to 968, 1,333.98 and 618.08

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Solution

The fourth proportional to 968, 1,333.98 and 618.08 is: 851.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    968 : 1,333.98 = 618.08 : x
  2. Step 2: Convert to fraction form
    968/1,333.98 = 618.08/x
  3. Step 3: Cross multiply
    968x = 1,333.98 × 618.08
  4. Step 4: Simplify right side
    968x = 824,506.36
  5. Step 5: Solve for x
    x = 824,506.36/968
  6. Step 6: Final answer
    x = 851.76

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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.