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Finding the Fourth Proportional to 1,865, 2,572.12 and 1,360.16

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Solution

The fourth proportional to 1,865, 2,572.12 and 1,360.16 is: 1,875.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,865 : 2,572.12 = 1,360.16 : x
  2. Step 2: Convert to fraction form
    1,865/2,572.12 = 1,360.16/x
  3. Step 3: Cross multiply
    1,865x = 2,572.12 × 1,360.16
  4. Step 4: Simplify right side
    1,865x = 3,498,494.74
  5. Step 5: Solve for x
    x = 3,498,494.74/1,865
  6. Step 6: Final answer
    x = 1,875.87

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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.