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Finding the Fourth Proportional to 659,021.22, 909,420.42 and 387,117

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Solution

The fourth proportional to 659,021.22, 909,420.42 and 387,117 is: 534,204.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,021.22 : 909,420.42 = 387,117 : x
  2. Step 2: Convert to fraction form
    659,021.22/909,420.42 = 387,117/x
  3. Step 3: Cross multiply
    659,021.22x = 909,420.42 × 387,117
  4. Step 4: Simplify right side
    659,021.22x = 352,052,104,729.14
  5. Step 5: Solve for x
    x = 352,052,104,729.14/659,021.22
  6. Step 6: Final answer
    x = 534,204.51

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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.