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Finding the Fourth Proportional to 700,984.60, 967,409.80 and 390,908.16

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Solution

The fourth proportional to 700,984.60, 967,409.80 and 390,908.16 is: 539,481.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    700,984.60 : 967,409.80 = 390,908.16 : x
  2. Step 2: Convert to fraction form
    700,984.60/967,409.80 = 390,908.16/x
  3. Step 3: Cross multiply
    700,984.60x = 967,409.80 × 390,908.16
  4. Step 4: Simplify right side
    700,984.60x = 378,168,383,906.70
  5. Step 5: Solve for x
    x = 378,168,383,906.70/700,984.60
  6. Step 6: Final answer
    x = 539,481.73

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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.