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Finding the Fourth Proportional to 1,346.28, 1,857.84 and 787.08

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Solution

The fourth proportional to 1,346.28, 1,857.84 and 787.08 is: 1,086.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,346.28 : 1,857.84 = 787.08 : x
  2. Step 2: Convert to fraction form
    1,346.28/1,857.84 = 787.08/x
  3. Step 3: Cross multiply
    1,346.28x = 1,857.84 × 787.08
  4. Step 4: Simplify right side
    1,346.28x = 1,462,268.71
  5. Step 5: Solve for x
    x = 1,462,268.71/1,346.28
  6. Step 6: Final answer
    x = 1,086.15

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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.