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Finding the Fourth Proportional to 426,498.62, 639,195.71 and 173,485.40

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Solution

The fourth proportional to 426,498.62, 639,195.71 and 173,485.40 is: 260,003.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,498.62 : 639,195.71 = 173,485.40 : x
  2. Step 2: Convert to fraction form
    426,498.62/639,195.71 = 173,485.40/x
  3. Step 3: Cross multiply
    426,498.62x = 639,195.71 × 173,485.40
  4. Step 4: Simplify right side
    426,498.62x = 110,891,119,364.23
  5. Step 5: Solve for x
    x = 110,891,119,364.23/426,498.62
  6. Step 6: Final answer
    x = 260,003.47

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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.