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Finding the Fourth Proportional to 417,924.40, 626,987.40 and 137,426.80

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Solution

The fourth proportional to 417,924.40, 626,987.40 and 137,426.80 is: 206,173.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,924.40 : 626,987.40 = 137,426.80 : x
  2. Step 2: Convert to fraction form
    417,924.40/626,987.40 = 137,426.80/x
  3. Step 3: Cross multiply
    417,924.40x = 626,987.40 × 137,426.80
  4. Step 4: Simplify right side
    417,924.40x = 86,164,872,022.32
  5. Step 5: Solve for x
    x = 86,164,872,022.32/417,924.40
  6. Step 6: Final answer
    x = 206,173.35

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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.