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Finding the Fourth Proportional to 425,294.93, 638,033.93 and 212,177.45

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Solution

The fourth proportional to 425,294.93, 638,033.93 and 212,177.45 is: 318,311.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,294.93 : 638,033.93 = 212,177.45 : x
  2. Step 2: Convert to fraction form
    425,294.93/638,033.93 = 212,177.45/x
  3. Step 3: Cross multiply
    425,294.93x = 638,033.93 × 212,177.45
  4. Step 4: Simplify right side
    425,294.93x = 135,376,412,280.88
  5. Step 5: Solve for x
    x = 135,376,412,280.88/425,294.93
  6. Step 6: Final answer
    x = 318,311.84

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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.