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Finding the Fourth Proportional to 1,021.60, 1,532.40 and 657.10

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Solution

The fourth proportional to 1,021.60, 1,532.40 and 657.10 is: 985.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.60 : 1,532.40 = 657.10 : x
  2. Step 2: Convert to fraction form
    1,021.60/1,532.40 = 657.10/x
  3. Step 3: Cross multiply
    1,021.60x = 1,532.40 × 657.10
  4. Step 4: Simplify right side
    1,021.60x = 1,006,940.04
  5. Step 5: Solve for x
    x = 1,006,940.04/1,021.60
  6. Step 6: Final answer
    x = 985.65

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Double scale
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Similar ratio
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1.5x scale

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.