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Finding the Fourth Proportional to 1,358.51, 2,036.34 and 578.88

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Solution

The fourth proportional to 1,358.51, 2,036.34 and 578.88 is: 867.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,358.51 : 2,036.34 = 578.88 : x
  2. Step 2: Convert to fraction form
    1,358.51/2,036.34 = 578.88/x
  3. Step 3: Cross multiply
    1,358.51x = 2,036.34 × 578.88
  4. Step 4: Simplify right side
    1,358.51x = 1,178,796.50
  5. Step 5: Solve for x
    x = 1,178,796.50/1,358.51
  6. Step 6: Final answer
    x = 867.72

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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.