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Finding the Fourth Proportional to 964.25, 1,330.65 and 632.10

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Solution

The fourth proportional to 964.25, 1,330.65 and 632.10 is: 872.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.25 : 1,330.65 = 632.10 : x
  2. Step 2: Convert to fraction form
    964.25/1,330.65 = 632.10/x
  3. Step 3: Cross multiply
    964.25x = 1,330.65 × 632.10
  4. Step 4: Simplify right side
    964.25x = 841,110.63
  5. Step 5: Solve for x
    x = 841,110.63/964.25
  6. Step 6: Final answer
    x = 872.29

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1.5x scale

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.