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Finding the Fourth Proportional to 1,225.46, 1,835.06 and 787.19

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Solution

The fourth proportional to 1,225.46, 1,835.06 and 787.19 is: 1,178.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.46 : 1,835.06 = 787.19 : x
  2. Step 2: Convert to fraction form
    1,225.46/1,835.06 = 787.19/x
  3. Step 3: Cross multiply
    1,225.46x = 1,835.06 × 787.19
  4. Step 4: Simplify right side
    1,225.46x = 1,444,527.77
  5. Step 5: Solve for x
    x = 1,444,527.77/1,225.46
  6. Step 6: Final answer
    x = 1,178.76

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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.