Home / 1,565.15-2,158.95-1,228.55

Finding the Fourth Proportional to 1,565.15, 2,158.95 and 1,228.55

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Solution

The fourth proportional to 1,565.15, 2,158.95 and 1,228.55 is: 1,694.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.15 : 2,158.95 = 1,228.55 : x
  2. Step 2: Convert to fraction form
    1,565.15/2,158.95 = 1,228.55/x
  3. Step 3: Cross multiply
    1,565.15x = 2,158.95 × 1,228.55
  4. Step 4: Simplify right side
    1,565.15x = 2,652,372.63
  5. Step 5: Solve for x
    x = 2,652,372.63/1,565.15
  6. Step 6: Final answer
    x = 1,694.64

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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.