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Finding the Fourth Proportional to 312,551.04, 431,318.88 and 178,415.04

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Solution

The fourth proportional to 312,551.04, 431,318.88 and 178,415.04 is: 246,211.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,551.04 : 431,318.88 = 178,415.04 : x
  2. Step 2: Convert to fraction form
    312,551.04/431,318.88 = 178,415.04/x
  3. Step 3: Cross multiply
    312,551.04x = 431,318.88 × 178,415.04
  4. Step 4: Simplify right side
    312,551.04x = 76,953,775,227.96
  5. Step 5: Solve for x
    x = 76,953,775,227.96/312,551.04
  6. Step 6: Final answer
    x = 246,211.87

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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.