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Finding the Fourth Proportional to 426,501.62, 639,200.21 and 173,488.40

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Solution

The fourth proportional to 426,501.62, 639,200.21 and 173,488.40 is: 260,007.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,501.62 : 639,200.21 = 173,488.40 : x
  2. Step 2: Convert to fraction form
    426,501.62/639,200.21 = 173,488.40/x
  3. Step 3: Cross multiply
    426,501.62x = 639,200.21 × 173,488.40
  4. Step 4: Simplify right side
    426,501.62x = 110,893,817,649.12
  5. Step 5: Solve for x
    x = 110,893,817,649.12/426,501.62
  6. Step 6: Final answer
    x = 260,007.97

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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.