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Finding the Fourth Proportional to 709,277.31, 978,801.24 and 386,987.22

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Solution

The fourth proportional to 709,277.31, 978,801.24 and 386,987.22 is: 534,041.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,277.31 : 978,801.24 = 386,987.22 : x
  2. Step 2: Convert to fraction form
    709,277.31/978,801.24 = 386,987.22/x
  3. Step 3: Cross multiply
    709,277.31x = 978,801.24 × 386,987.22
  4. Step 4: Simplify right side
    709,277.31x = 378,783,570,800.15
  5. Step 5: Solve for x
    x = 378,783,570,800.15/709,277.31
  6. Step 6: Final answer
    x = 534,041.57

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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.