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Finding the Fourth Proportional to 675.79, 1,013.30 and 259.36

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Solution

The fourth proportional to 675.79, 1,013.30 and 259.36 is: 388.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.79 : 1,013.30 = 259.36 : x
  2. Step 2: Convert to fraction form
    675.79/1,013.30 = 259.36/x
  3. Step 3: Cross multiply
    675.79x = 1,013.30 × 259.36
  4. Step 4: Simplify right side
    675.79x = 262,808.19
  5. Step 5: Solve for x
    x = 262,808.19/675.79
  6. Step 6: Final answer
    x = 388.89

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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.