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Finding the Fourth Proportional to 317,618.90, 438,308.64 and 174,377.90

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Solution

The fourth proportional to 317,618.90, 438,308.64 and 174,377.90 is: 240,638.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,618.90 : 438,308.64 = 174,377.90 : x
  2. Step 2: Convert to fraction form
    317,618.90/438,308.64 = 174,377.90/x
  3. Step 3: Cross multiply
    317,618.90x = 438,308.64 × 174,377.90
  4. Step 4: Simplify right side
    317,618.90x = 76,431,340,195.06
  5. Step 5: Solve for x
    x = 76,431,340,195.06/317,618.90
  6. Step 6: Final answer
    x = 240,638.51

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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.