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Finding the Fourth Proportional to 954, 1,316.88 and 688.95

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Solution

The fourth proportional to 954, 1,316.88 and 688.95 is: 951.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    954 : 1,316.88 = 688.95 : x
  2. Step 2: Convert to fraction form
    954/1,316.88 = 688.95/x
  3. Step 3: Cross multiply
    954x = 1,316.88 × 688.95
  4. Step 4: Simplify right side
    954x = 907,264.48
  5. Step 5: Solve for x
    x = 907,264.48/954
  6. Step 6: Final answer
    x = 951.01

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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.