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Finding the Fourth Proportional to 465,438.48, 698,059.70 and 212,647.20

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Solution

The fourth proportional to 465,438.48, 698,059.70 and 212,647.20 is: 318,926.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,438.48 : 698,059.70 = 212,647.20 : x
  2. Step 2: Convert to fraction form
    465,438.48/698,059.70 = 212,647.20/x
  3. Step 3: Cross multiply
    465,438.48x = 698,059.70 × 212,647.20
  4. Step 4: Simplify right side
    465,438.48x = 148,440,440,637.84
  5. Step 5: Solve for x
    x = 148,440,440,637.84/465,438.48
  6. Step 6: Final answer
    x = 318,926.02

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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.