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Finding the Fourth Proportional to 934.48, 1,402.26 and 645.40

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Solution

The fourth proportional to 934.48, 1,402.26 and 645.40 is: 968.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.48 : 1,402.26 = 645.40 : x
  2. Step 2: Convert to fraction form
    934.48/1,402.26 = 645.40/x
  3. Step 3: Cross multiply
    934.48x = 1,402.26 × 645.40
  4. Step 4: Simplify right side
    934.48x = 905,018.60
  5. Step 5: Solve for x
    x = 905,018.60/934.48
  6. Step 6: Final answer
    x = 968.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.