Home / 1,018.90-1,528.28-288.44

Finding the Fourth Proportional to 1,018.90, 1,528.28 and 288.44

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Solution

The fourth proportional to 1,018.90, 1,528.28 and 288.44 is: 432.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.90 : 1,528.28 = 288.44 : x
  2. Step 2: Convert to fraction form
    1,018.90/1,528.28 = 288.44/x
  3. Step 3: Cross multiply
    1,018.90x = 1,528.28 × 288.44
  4. Step 4: Simplify right side
    1,018.90x = 440,817.08
  5. Step 5: Solve for x
    x = 440,817.08/1,018.90
  6. Step 6: Final answer
    x = 432.64

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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.