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Finding the Fourth Proportional to 1,015.96, 1,400.70 and 875.92

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Solution

The fourth proportional to 1,015.96, 1,400.70 and 875.92 is: 1,207.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.96 : 1,400.70 = 875.92 : x
  2. Step 2: Convert to fraction form
    1,015.96/1,400.70 = 875.92/x
  3. Step 3: Cross multiply
    1,015.96x = 1,400.70 × 875.92
  4. Step 4: Simplify right side
    1,015.96x = 1,226,901.14
  5. Step 5: Solve for x
    x = 1,226,901.14/1,015.96
  6. Step 6: Final answer
    x = 1,207.63

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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.