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Finding the Fourth Proportional to 1,026.32, 1,416.90 and 678.02

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Solution

The fourth proportional to 1,026.32, 1,416.90 and 678.02 is: 936.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,026.32 : 1,416.90 = 678.02 : x
  2. Step 2: Convert to fraction form
    1,026.32/1,416.90 = 678.02/x
  3. Step 3: Cross multiply
    1,026.32x = 1,416.90 × 678.02
  4. Step 4: Simplify right side
    1,026.32x = 960,676.06
  5. Step 5: Solve for x
    x = 960,676.06/1,026.32
  6. Step 6: Final answer
    x = 936.04

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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.