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Finding the Fourth Proportional to 239,614.40, 359,421.60 and 212,657.60

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Solution

The fourth proportional to 239,614.40, 359,421.60 and 212,657.60 is: 318,986.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,614.40 : 359,421.60 = 212,657.60 : x
  2. Step 2: Convert to fraction form
    239,614.40/359,421.60 = 212,657.60/x
  3. Step 3: Cross multiply
    239,614.40x = 359,421.60 × 212,657.60
  4. Step 4: Simplify right side
    239,614.40x = 76,433,734,844.16
  5. Step 5: Solve for x
    x = 76,433,734,844.16/239,614.40
  6. Step 6: Final answer
    x = 318,986.40

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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.