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Finding the Fourth Proportional to 673.67, 928.80 and 437.20

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Solution

The fourth proportional to 673.67, 928.80 and 437.20 is: 602.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.67 : 928.80 = 437.20 : x
  2. Step 2: Convert to fraction form
    673.67/928.80 = 437.20/x
  3. Step 3: Cross multiply
    673.67x = 928.80 × 437.20
  4. Step 4: Simplify right side
    673.67x = 406,071.36
  5. Step 5: Solve for x
    x = 406,071.36/673.67
  6. Step 6: Final answer
    x = 602.77

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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.