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Finding the Fourth Proportional to 398,814.80, 598,222.20 and 266,104.40

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Solution

The fourth proportional to 398,814.80, 598,222.20 and 266,104.40 is: 399,156.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,814.80 : 598,222.20 = 266,104.40 : x
  2. Step 2: Convert to fraction form
    398,814.80/598,222.20 = 266,104.40/x
  3. Step 3: Cross multiply
    398,814.80x = 598,222.20 × 266,104.40
  4. Step 4: Simplify right side
    398,814.80x = 159,189,559,597.68
  5. Step 5: Solve for x
    x = 159,189,559,597.68/398,814.80
  6. Step 6: Final answer
    x = 399,156.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.