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Finding the Fourth Proportional to 478,992.96, 661,026.25 and 261,213.55

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Solution

The fourth proportional to 478,992.96, 661,026.25 and 261,213.55 is: 360,483.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,992.96 : 661,026.25 = 261,213.55 : x
  2. Step 2: Convert to fraction form
    478,992.96/661,026.25 = 261,213.55/x
  3. Step 3: Cross multiply
    478,992.96x = 661,026.25 × 261,213.55
  4. Step 4: Simplify right side
    478,992.96x = 172,669,013,578.94
  5. Step 5: Solve for x
    x = 172,669,013,578.94/478,992.96
  6. Step 6: Final answer
    x = 360,483.40

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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.