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Finding the Fourth Proportional to 934.64, 1,395.12 and 866.96

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Solution

The fourth proportional to 934.64, 1,395.12 and 866.96 is: 1,294.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.64 : 1,395.12 = 866.96 : x
  2. Step 2: Convert to fraction form
    934.64/1,395.12 = 866.96/x
  3. Step 3: Cross multiply
    934.64x = 1,395.12 × 866.96
  4. Step 4: Simplify right side
    934.64x = 1,209,513.24
  5. Step 5: Solve for x
    x = 1,209,513.24/934.64
  6. Step 6: Final answer
    x = 1,294.10

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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.