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Finding the Fourth Proportional to 652.61, 978.95 and 190.39

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Solution

The fourth proportional to 652.61, 978.95 and 190.39 is: 285.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.61 : 978.95 = 190.39 : x
  2. Step 2: Convert to fraction form
    652.61/978.95 = 190.39/x
  3. Step 3: Cross multiply
    652.61x = 978.95 × 190.39
  4. Step 4: Simplify right side
    652.61x = 186,380.32
  5. Step 5: Solve for x
    x = 186,380.32/652.61
  6. Step 6: Final answer
    x = 285.59

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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.