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Finding the Fourth Proportional to 315,447.91, 435,474.20 and 194,655.72

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Solution

The fourth proportional to 315,447.91, 435,474.20 and 194,655.72 is: 268,721.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,447.91 : 435,474.20 = 194,655.72 : x
  2. Step 2: Convert to fraction form
    315,447.91/435,474.20 = 194,655.72/x
  3. Step 3: Cross multiply
    315,447.91x = 435,474.20 × 194,655.72
  4. Step 4: Simplify right side
    315,447.91x = 84,767,543,942.42
  5. Step 5: Solve for x
    x = 84,767,543,942.42/315,447.91
  6. Step 6: Final answer
    x = 268,721.21

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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.