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Finding the Fourth Proportional to 659,019.22, 909,417.66 and 387,115

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Solution

The fourth proportional to 659,019.22, 909,417.66 and 387,115 is: 534,201.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,019.22 : 909,417.66 = 387,115 : x
  2. Step 2: Convert to fraction form
    659,019.22/909,417.66 = 387,115/x
  3. Step 3: Cross multiply
    659,019.22x = 909,417.66 × 387,115
  4. Step 4: Simplify right side
    659,019.22x = 352,049,217,450.90
  5. Step 5: Solve for x
    x = 352,049,217,450.90/659,019.22
  6. Step 6: Final answer
    x = 534,201.75

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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.