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Finding the Fourth Proportional to 478,998.78, 661,005.54 and 264,135.12

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Solution

The fourth proportional to 478,998.78, 661,005.54 and 264,135.12 is: 364,499.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,998.78 : 661,005.54 = 264,135.12 : x
  2. Step 2: Convert to fraction form
    478,998.78/661,005.54 = 264,135.12/x
  3. Step 3: Cross multiply
    478,998.78x = 661,005.54 × 264,135.12
  4. Step 4: Simplify right side
    478,998.78x = 174,594,777,628.57
  5. Step 5: Solve for x
    x = 174,594,777,628.57/478,998.78
  6. Step 6: Final answer
    x = 364,499.42

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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.