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Finding the Fourth Proportional to 630,042.96, 869,480.28 and 343,578.72

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Solution

The fourth proportional to 630,042.96, 869,480.28 and 343,578.72 is: 474,150.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,042.96 : 869,480.28 = 343,578.72 : x
  2. Step 2: Convert to fraction form
    630,042.96/869,480.28 = 343,578.72/x
  3. Step 3: Cross multiply
    630,042.96x = 869,480.28 × 343,578.72
  4. Step 4: Simplify right side
    630,042.96x = 298,734,921,667.64
  5. Step 5: Solve for x
    x = 298,734,921,667.64/630,042.96
  6. Step 6: Final answer
    x = 474,150.08

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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.