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Finding the Fourth Proportional to 316,912.55, 437,340.85 and 171,718.30

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Solution

The fourth proportional to 316,912.55, 437,340.85 and 171,718.30 is: 236,972.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,912.55 : 437,340.85 = 171,718.30 : x
  2. Step 2: Convert to fraction form
    316,912.55/437,340.85 = 171,718.30/x
  3. Step 3: Cross multiply
    316,912.55x = 437,340.85 × 171,718.30
  4. Step 4: Simplify right side
    316,912.55x = 75,099,425,759.91
  5. Step 5: Solve for x
    x = 75,099,425,759.91/316,912.55
  6. Step 6: Final answer
    x = 236,972.08

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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.