Home / 1,417.36-2,127.38-870.61

Finding the Fourth Proportional to 1,417.36, 2,127.38 and 870.61

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Solution

The fourth proportional to 1,417.36, 2,127.38 and 870.61 is: 1,306.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.36 : 2,127.38 = 870.61 : x
  2. Step 2: Convert to fraction form
    1,417.36/2,127.38 = 870.61/x
  3. Step 3: Cross multiply
    1,417.36x = 2,127.38 × 870.61
  4. Step 4: Simplify right side
    1,417.36x = 1,852,115.16
  5. Step 5: Solve for x
    x = 1,852,115.16/1,417.36
  6. Step 6: Final answer
    x = 1,306.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.