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Finding the Fourth Proportional to 661,047.35, 911,909.61 and 431,738.87

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Solution

The fourth proportional to 661,047.35, 911,909.61 and 431,738.87 is: 595,580.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,047.35 : 911,909.61 = 431,738.87 : x
  2. Step 2: Convert to fraction form
    661,047.35/911,909.61 = 431,738.87/x
  3. Step 3: Cross multiply
    661,047.35x = 911,909.61 × 431,738.87
  4. Step 4: Simplify right side
    661,047.35x = 393,706,820,003.99
  5. Step 5: Solve for x
    x = 393,706,820,003.99/661,047.35
  6. Step 6: Final answer
    x = 595,580.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.