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Finding the Fourth Proportional to 440,078.47, 660,342.78 and 209,528.37

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Solution

The fourth proportional to 440,078.47, 660,342.78 and 209,528.37 is: 314,399.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,078.47 : 660,342.78 = 209,528.37 : x
  2. Step 2: Convert to fraction form
    440,078.47/660,342.78 = 209,528.37/x
  3. Step 3: Cross multiply
    440,078.47x = 660,342.78 × 209,528.37
  4. Step 4: Simplify right side
    440,078.47x = 138,360,546,334.67
  5. Step 5: Solve for x
    x = 138,360,546,334.67/440,078.47
  6. Step 6: Final answer
    x = 314,399.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.