Home / 1,875.14-2,587.80-1,078.72

Finding the Fourth Proportional to 1,875.14, 2,587.80 and 1,078.72

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Solution

The fourth proportional to 1,875.14, 2,587.80 and 1,078.72 is: 1,488.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.14 : 2,587.80 = 1,078.72 : x
  2. Step 2: Convert to fraction form
    1,875.14/2,587.80 = 1,078.72/x
  3. Step 3: Cross multiply
    1,875.14x = 2,587.80 × 1,078.72
  4. Step 4: Simplify right side
    1,875.14x = 2,791,511.62
  5. Step 5: Solve for x
    x = 2,791,511.62/1,875.14
  6. Step 6: Final answer
    x = 1,488.70

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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.