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Finding the Fourth Proportional to 709,344.90, 978,935.58 and 387,060.48

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Solution

The fourth proportional to 709,344.90, 978,935.58 and 387,060.48 is: 534,165.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,344.90 : 978,935.58 = 387,060.48 : x
  2. Step 2: Convert to fraction form
    709,344.90/978,935.58 = 387,060.48/x
  3. Step 3: Cross multiply
    709,344.90x = 978,935.58 × 387,060.48
  4. Step 4: Simplify right side
    709,344.90x = 378,907,275,483.88
  5. Step 5: Solve for x
    x = 378,907,275,483.88/709,344.90
  6. Step 6: Final answer
    x = 534,165.08

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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.