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Finding the Fourth Proportional to 659,139.67, 909,604.56 and 387,232.35

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Solution

The fourth proportional to 659,139.67, 909,604.56 and 387,232.35 is: 534,375.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,139.67 : 909,604.56 = 387,232.35 : x
  2. Step 2: Convert to fraction form
    659,139.67/909,604.56 = 387,232.35/x
  3. Step 3: Cross multiply
    659,139.67x = 909,604.56 × 387,232.35
  4. Step 4: Simplify right side
    659,139.67x = 352,228,314,024.47
  5. Step 5: Solve for x
    x = 352,228,314,024.47/659,139.67
  6. Step 6: Final answer
    x = 534,375.84

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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.