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Finding the Fourth Proportional to 426,398.96, 639,462.36 and 173,678.96

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Solution

The fourth proportional to 426,398.96, 639,462.36 and 173,678.96 is: 260,463.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,398.96 : 639,462.36 = 173,678.96 : x
  2. Step 2: Convert to fraction form
    426,398.96/639,462.36 = 173,678.96/x
  3. Step 3: Cross multiply
    426,398.96x = 639,462.36 × 173,678.96
  4. Step 4: Simplify right side
    426,398.96x = 111,061,157,643.95
  5. Step 5: Solve for x
    x = 111,061,157,643.95/426,398.96
  6. Step 6: Final answer
    x = 260,463.01

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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.