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Finding the Fourth Proportional to 1,572.96, 2,170.54 and 910.04

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Solution

The fourth proportional to 1,572.96, 2,170.54 and 910.04 is: 1,255.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.96 : 2,170.54 = 910.04 : x
  2. Step 2: Convert to fraction form
    1,572.96/2,170.54 = 910.04/x
  3. Step 3: Cross multiply
    1,572.96x = 2,170.54 × 910.04
  4. Step 4: Simplify right side
    1,572.96x = 1,975,278.22
  5. Step 5: Solve for x
    x = 1,975,278.22/1,572.96
  6. Step 6: Final answer
    x = 1,255.77

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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.