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Finding the Fourth Proportional to 673.69, 1,009.19 and 339.13

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Solution

The fourth proportional to 673.69, 1,009.19 and 339.13 is: 508.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.69 : 1,009.19 = 339.13 : x
  2. Step 2: Convert to fraction form
    673.69/1,009.19 = 339.13/x
  3. Step 3: Cross multiply
    673.69x = 1,009.19 × 339.13
  4. Step 4: Simplify right side
    673.69x = 342,246.60
  5. Step 5: Solve for x
    x = 342,246.60/673.69
  6. Step 6: Final answer
    x = 508.02

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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.