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Finding the Fourth Proportional to 315,959.80, 436,024.56 and 172,720.48

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Solution

The fourth proportional to 315,959.80, 436,024.56 and 172,720.48 is: 238,354.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,959.80 : 436,024.56 = 172,720.48 : x
  2. Step 2: Convert to fraction form
    315,959.80/436,024.56 = 172,720.48/x
  3. Step 3: Cross multiply
    315,959.80x = 436,024.56 × 172,720.48
  4. Step 4: Simplify right side
    315,959.80x = 75,310,371,294.99
  5. Step 5: Solve for x
    x = 75,310,371,294.99/315,959.80
  6. Step 6: Final answer
    x = 238,354.28

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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.