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Finding the Fourth Proportional to 652.10, 978.44 and 287.01

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Solution

The fourth proportional to 652.10, 978.44 and 287.01 is: 430.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.10 : 978.44 = 287.01 : x
  2. Step 2: Convert to fraction form
    652.10/978.44 = 287.01/x
  3. Step 3: Cross multiply
    652.10x = 978.44 × 287.01
  4. Step 4: Simplify right side
    652.10x = 280,820.63
  5. Step 5: Solve for x
    x = 280,820.63/652.10
  6. Step 6: Final answer
    x = 430.64

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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.