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Finding the Fourth Proportional to 1,017.23, 1,525.80 and 286.81

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Solution

The fourth proportional to 1,017.23, 1,525.80 and 286.81 is: 430.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.23 : 1,525.80 = 286.81 : x
  2. Step 2: Convert to fraction form
    1,017.23/1,525.80 = 286.81/x
  3. Step 3: Cross multiply
    1,017.23x = 1,525.80 × 286.81
  4. Step 4: Simplify right side
    1,017.23x = 437,611.96
  5. Step 5: Solve for x
    x = 437,611.96/1,017.23
  6. Step 6: Final answer
    x = 430.20

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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.