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Finding the Fourth Proportional to 957.51, 1,321.61 and 663.17

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Solution

The fourth proportional to 957.51, 1,321.61 and 663.17 is: 915.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.51 : 1,321.61 = 663.17 : x
  2. Step 2: Convert to fraction form
    957.51/1,321.61 = 663.17/x
  3. Step 3: Cross multiply
    957.51x = 1,321.61 × 663.17
  4. Step 4: Simplify right side
    957.51x = 876,442.18
  5. Step 5: Solve for x
    x = 876,442.18/957.51
  6. Step 6: Final answer
    x = 915.33

Related Problems

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Double scale
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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.