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Finding the Fourth Proportional to 440,031.60, 660,047.40 and 287,816.40

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Solution

The fourth proportional to 440,031.60, 660,047.40 and 287,816.40 is: 431,724.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,031.60 : 660,047.40 = 287,816.40 : x
  2. Step 2: Convert to fraction form
    440,031.60/660,047.40 = 287,816.40/x
  3. Step 3: Cross multiply
    440,031.60x = 660,047.40 × 287,816.40
  4. Step 4: Simplify right side
    440,031.60x = 189,972,466,497.36
  5. Step 5: Solve for x
    x = 189,972,466,497.36/440,031.60
  6. Step 6: Final answer
    x = 431,724.60

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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.