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Finding the Fourth Proportional to 317,808.90, 438,638.82 and 180,012.48

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Solution

The fourth proportional to 317,808.90, 438,638.82 and 180,012.48 is: 248,452.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,808.90 : 438,638.82 = 180,012.48 : x
  2. Step 2: Convert to fraction form
    317,808.90/438,638.82 = 180,012.48/x
  3. Step 3: Cross multiply
    317,808.90x = 438,638.82 × 180,012.48
  4. Step 4: Simplify right side
    317,808.90x = 78,960,461,812.47
  5. Step 5: Solve for x
    x = 78,960,461,812.47/317,808.90
  6. Step 6: Final answer
    x = 248,452.65

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1.5x scale

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.