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Finding the Fourth Proportional to 1,572.95, 2,165.94 and 1,074.74

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Solution

The fourth proportional to 1,572.95, 2,165.94 and 1,074.74 is: 1,479.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.95 : 2,165.94 = 1,074.74 : x
  2. Step 2: Convert to fraction form
    1,572.95/2,165.94 = 1,074.74/x
  3. Step 3: Cross multiply
    1,572.95x = 2,165.94 × 1,074.74
  4. Step 4: Simplify right side
    1,572.95x = 2,327,811.53
  5. Step 5: Solve for x
    x = 2,327,811.53/1,572.95
  6. Step 6: Final answer
    x = 1,479.90

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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.