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Finding the Fourth Proportional to 659,635.40, 989,021.10 and 260,035.40

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Solution

The fourth proportional to 659,635.40, 989,021.10 and 260,035.40 is: 389,882.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,635.40 : 989,021.10 = 260,035.40 : x
  2. Step 2: Convert to fraction form
    659,635.40/989,021.10 = 260,035.40/x
  3. Step 3: Cross multiply
    659,635.40x = 989,021.10 × 260,035.40
  4. Step 4: Simplify right side
    659,635.40x = 257,180,497,346.94
  5. Step 5: Solve for x
    x = 257,180,497,346.94/659,635.40
  6. Step 6: Final answer
    x = 389,882.80

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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.