Home / 1,572.11-2,170.96-1,178.45

Finding the Fourth Proportional to 1,572.11, 2,170.96 and 1,178.45

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Solution

The fourth proportional to 1,572.11, 2,170.96 and 1,178.45 is: 1,627.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.11 : 2,170.96 = 1,178.45 : x
  2. Step 2: Convert to fraction form
    1,572.11/2,170.96 = 1,178.45/x
  3. Step 3: Cross multiply
    1,572.11x = 2,170.96 × 1,178.45
  4. Step 4: Simplify right side
    1,572.11x = 2,558,367.81
  5. Step 5: Solve for x
    x = 2,558,367.81/1,572.11
  6. Step 6: Final answer
    x = 1,627.35

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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.