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Finding the Fourth Proportional to 652.72, 978.24 and 287.02

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Solution

The fourth proportional to 652.72, 978.24 and 287.02 is: 430.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.72 : 978.24 = 287.02 : x
  2. Step 2: Convert to fraction form
    652.72/978.24 = 287.02/x
  3. Step 3: Cross multiply
    652.72x = 978.24 × 287.02
  4. Step 4: Simplify right side
    652.72x = 280,774.44
  5. Step 5: Solve for x
    x = 280,774.44/652.72
  6. Step 6: Final answer
    x = 430.16

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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.