Home / 317,712.21-438,429.72-172,512.30

Finding the Fourth Proportional to 317,712.21, 438,429.72 and 172,512.30

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Solution

The fourth proportional to 317,712.21, 438,429.72 and 172,512.30 is: 238,059.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,712.21 : 438,429.72 = 172,512.30 : x
  2. Step 2: Convert to fraction form
    317,712.21/438,429.72 = 172,512.30/x
  3. Step 3: Cross multiply
    317,712.21x = 438,429.72 × 172,512.30
  4. Step 4: Simplify right side
    317,712.21x = 75,634,519,385.56
  5. Step 5: Solve for x
    x = 75,634,519,385.56/317,712.21
  6. Step 6: Final answer
    x = 238,059.84

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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.