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Finding the Fourth Proportional to 630,403.78, 869,926.89 and 343,906.78

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Solution

The fourth proportional to 630,403.78, 869,926.89 and 343,906.78 is: 474,574.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,403.78 : 869,926.89 = 343,906.78 : x
  2. Step 2: Convert to fraction form
    630,403.78/869,926.89 = 343,906.78/x
  3. Step 3: Cross multiply
    630,403.78x = 869,926.89 × 343,906.78
  4. Step 4: Simplify right side
    630,403.78x = 299,173,755,575.31
  5. Step 5: Solve for x
    x = 299,173,755,575.31/630,403.78
  6. Step 6: Final answer
    x = 474,574.81

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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.