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Finding the Fourth Proportional to 1,017.25, 1,525.88 and 286.81

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Solution

The fourth proportional to 1,017.25, 1,525.88 and 286.81 is: 430.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,017.25 : 1,525.88 = 286.81 : x
  2. Step 2: Convert to fraction form
    1,017.25/1,525.88 = 286.81/x
  3. Step 3: Cross multiply
    1,017.25x = 1,525.88 × 286.81
  4. Step 4: Simplify right side
    1,017.25x = 437,637.64
  5. Step 5: Solve for x
    x = 437,637.64/1,017.25
  6. Step 6: Final answer
    x = 430.22

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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.