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Finding the Fourth Proportional to 1,017.46, 1,525.93 and 287.11

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Solution

The fourth proportional to 1,017.46, 1,525.93 and 287.11 is: 430.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.46 : 1,525.93 = 287.11 : x
  2. Step 2: Convert to fraction form
    1,017.46/1,525.93 = 287.11/x
  3. Step 3: Cross multiply
    1,017.46x = 1,525.93 × 287.11
  4. Step 4: Simplify right side
    1,017.46x = 438,109.76
  5. Step 5: Solve for x
    x = 438,109.76/1,017.46
  6. Step 6: Final answer
    x = 430.59

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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.