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Finding the Fourth Proportional to 618.83, 928.54 and 437.39

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Solution

The fourth proportional to 618.83, 928.54 and 437.39 is: 656.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.83 : 928.54 = 437.39 : x
  2. Step 2: Convert to fraction form
    618.83/928.54 = 437.39/x
  3. Step 3: Cross multiply
    618.83x = 928.54 × 437.39
  4. Step 4: Simplify right side
    618.83x = 406,129.47
  5. Step 5: Solve for x
    x = 406,129.47/618.83
  6. Step 6: Final answer
    x = 656.29

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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.