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Finding the Fourth Proportional to 311,888.20, 430,405.41 and 168,647.90

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Solution

The fourth proportional to 311,888.20, 430,405.41 and 168,647.90 is: 232,733.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,888.20 : 430,405.41 = 168,647.90 : x
  2. Step 2: Convert to fraction form
    311,888.20/430,405.41 = 168,647.90/x
  3. Step 3: Cross multiply
    311,888.20x = 430,405.41 × 168,647.90
  4. Step 4: Simplify right side
    311,888.20x = 72,586,968,545.14
  5. Step 5: Solve for x
    x = 72,586,968,545.14/311,888.20
  6. Step 6: Final answer
    x = 232,733.94

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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.