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Finding the Fourth Proportional to 1,572.78, 2,170.18 and 943.14

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Solution

The fourth proportional to 1,572.78, 2,170.18 and 943.14 is: 1,301.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.78 : 2,170.18 = 943.14 : x
  2. Step 2: Convert to fraction form
    1,572.78/2,170.18 = 943.14/x
  3. Step 3: Cross multiply
    1,572.78x = 2,170.18 × 943.14
  4. Step 4: Simplify right side
    1,572.78x = 2,046,783.57
  5. Step 5: Solve for x
    x = 2,046,783.57/1,572.78
  6. Step 6: Final answer
    x = 1,301.38

Related Problems

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Half scale
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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.