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Finding the Fourth Proportional to 1,191.77, 1,787.59 and 370.12

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Solution

The fourth proportional to 1,191.77, 1,787.59 and 370.12 is: 555.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.77 : 1,787.59 = 370.12 : x
  2. Step 2: Convert to fraction form
    1,191.77/1,787.59 = 370.12/x
  3. Step 3: Cross multiply
    1,191.77x = 1,787.59 × 370.12
  4. Step 4: Simplify right side
    1,191.77x = 661,617.42
  5. Step 5: Solve for x
    x = 661,617.42/1,191.77
  6. Step 6: Final answer
    x = 555.16

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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.