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Finding the Fourth Proportional to 652.17, 978.77 and 339.51

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Solution

The fourth proportional to 652.17, 978.77 and 339.51 is: 509.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.17 : 978.77 = 339.51 : x
  2. Step 2: Convert to fraction form
    652.17/978.77 = 339.51/x
  3. Step 3: Cross multiply
    652.17x = 978.77 × 339.51
  4. Step 4: Simplify right side
    652.17x = 332,302.20
  5. Step 5: Solve for x
    x = 332,302.20/652.17
  6. Step 6: Final answer
    x = 509.53

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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.