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Finding the Fourth Proportional to 971.31, 1,464.28 and 908.67

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Solution

The fourth proportional to 971.31, 1,464.28 and 908.67 is: 1,369.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.31 : 1,464.28 = 908.67 : x
  2. Step 2: Convert to fraction form
    971.31/1,464.28 = 908.67/x
  3. Step 3: Cross multiply
    971.31x = 1,464.28 × 908.67
  4. Step 4: Simplify right side
    971.31x = 1,330,547.31
  5. Step 5: Solve for x
    x = 1,330,547.31/971.31
  6. Step 6: Final answer
    x = 1,369.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.