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Finding the Fourth Proportional to 1,346.93, 1,858.14 and 787.42

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Solution

The fourth proportional to 1,346.93, 1,858.14 and 787.42 is: 1,086.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,346.93 : 1,858.14 = 787.42 : x
  2. Step 2: Convert to fraction form
    1,346.93/1,858.14 = 787.42/x
  3. Step 3: Cross multiply
    1,346.93x = 1,858.14 × 787.42
  4. Step 4: Simplify right side
    1,346.93x = 1,463,132.66
  5. Step 5: Solve for x
    x = 1,463,132.66/1,346.93
  6. Step 6: Final answer
    x = 1,086.27

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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.