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Finding the Fourth Proportional to 2,347.61, 3,521.88 and 787.55

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Solution

The fourth proportional to 2,347.61, 3,521.88 and 787.55 is: 1,181.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,347.61 : 3,521.88 = 787.55 : x
  2. Step 2: Convert to fraction form
    2,347.61/3,521.88 = 787.55/x
  3. Step 3: Cross multiply
    2,347.61x = 3,521.88 × 787.55
  4. Step 4: Simplify right side
    2,347.61x = 2,773,656.59
  5. Step 5: Solve for x
    x = 2,773,656.59/2,347.61
  6. Step 6: Final answer
    x = 1,181.48

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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.