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Finding the Fourth Proportional to 652.64, 900.76 and 487.68

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Solution

The fourth proportional to 652.64, 900.76 and 487.68 is: 673.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.64 : 900.76 = 487.68 : x
  2. Step 2: Convert to fraction form
    652.64/900.76 = 487.68/x
  3. Step 3: Cross multiply
    652.64x = 900.76 × 487.68
  4. Step 4: Simplify right side
    652.64x = 439,282.64
  5. Step 5: Solve for x
    x = 439,282.64/652.64
  6. Step 6: Final answer
    x = 673.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.