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Finding the Fourth Proportional to 1,363.94, 2,041.35 and 987.14

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Solution

The fourth proportional to 1,363.94, 2,041.35 and 987.14 is: 1,477.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,363.94 : 2,041.35 = 987.14 : x
  2. Step 2: Convert to fraction form
    1,363.94/2,041.35 = 987.14/x
  3. Step 3: Cross multiply
    1,363.94x = 2,041.35 × 987.14
  4. Step 4: Simplify right side
    1,363.94x = 2,015,093.71
  5. Step 5: Solve for x
    x = 2,015,093.71/1,363.94
  6. Step 6: Final answer
    x = 1,477.41

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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.