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Finding the Fourth Proportional to 957.38, 1,321.61 and 608.07

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Solution

The fourth proportional to 957.38, 1,321.61 and 608.07 is: 839.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.38 : 1,321.61 = 608.07 : x
  2. Step 2: Convert to fraction form
    957.38/1,321.61 = 608.07/x
  3. Step 3: Cross multiply
    957.38x = 1,321.61 × 608.07
  4. Step 4: Simplify right side
    957.38x = 803,628.35
  5. Step 5: Solve for x
    x = 803,628.35/957.38
  6. Step 6: Final answer
    x = 839.40

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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.