Home / 1,565.79-2,156.19-1,399.95

Finding the Fourth Proportional to 1,565.79, 2,156.19 and 1,399.95

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Solution

The fourth proportional to 1,565.79, 2,156.19 and 1,399.95 is: 1,927.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.79 : 2,156.19 = 1,399.95 : x
  2. Step 2: Convert to fraction form
    1,565.79/2,156.19 = 1,399.95/x
  3. Step 3: Cross multiply
    1,565.79x = 2,156.19 × 1,399.95
  4. Step 4: Simplify right side
    1,565.79x = 3,018,558.19
  5. Step 5: Solve for x
    x = 3,018,558.19/1,565.79
  6. Step 6: Final answer
    x = 1,927.82

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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.