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Finding the Fourth Proportional to 462,991.20, 638,924.40 and 261,794.40

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Solution

The fourth proportional to 462,991.20, 638,924.40 and 261,794.40 is: 361,274.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    462,991.20 : 638,924.40 = 261,794.40 : x
  2. Step 2: Convert to fraction form
    462,991.20/638,924.40 = 261,794.40/x
  3. Step 3: Cross multiply
    462,991.20x = 638,924.40 × 261,794.40
  4. Step 4: Simplify right side
    462,991.20x = 167,266,829,943.36
  5. Step 5: Solve for x
    x = 167,266,829,943.36/462,991.20
  6. Step 6: Final answer
    x = 361,274.32

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1.5x scale

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.