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Finding the Fourth Proportional to 614.80, 848.40 and 352.78

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Solution

The fourth proportional to 614.80, 848.40 and 352.78 is: 486.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.80 : 848.40 = 352.78 : x
  2. Step 2: Convert to fraction form
    614.80/848.40 = 352.78/x
  3. Step 3: Cross multiply
    614.80x = 848.40 × 352.78
  4. Step 4: Simplify right side
    614.80x = 299,298.55
  5. Step 5: Solve for x
    x = 299,298.55/614.80
  6. Step 6: Final answer
    x = 486.82

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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.