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Finding the Fourth Proportional to 1,416.54, 1,954.82 and 787.18

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Solution

The fourth proportional to 1,416.54, 1,954.82 and 787.18 is: 1,086.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.54 : 1,954.82 = 787.18 : x
  2. Step 2: Convert to fraction form
    1,416.54/1,954.82 = 787.18/x
  3. Step 3: Cross multiply
    1,416.54x = 1,954.82 × 787.18
  4. Step 4: Simplify right side
    1,416.54x = 1,538,795.21
  5. Step 5: Solve for x
    x = 1,538,795.21/1,416.54
  6. Step 6: Final answer
    x = 1,086.31

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1.5x scale

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.