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Finding the Fourth Proportional to 709,014.32, 978,451.44 and 386,724.44

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Solution

The fourth proportional to 709,014.32, 978,451.44 and 386,724.44 is: 533,686.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,014.32 : 978,451.44 = 386,724.44 : x
  2. Step 2: Convert to fraction form
    709,014.32/978,451.44 = 386,724.44/x
  3. Step 3: Cross multiply
    709,014.32x = 978,451.44 × 386,724.44
  4. Step 4: Simplify right side
    709,014.32x = 378,391,085,201.19
  5. Step 5: Solve for x
    x = 378,391,085,201.19/709,014.32
  6. Step 6: Final answer
    x = 533,686.10

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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.