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Finding the Fourth Proportional to 630,397.28, 869,917.92 and 343,900.28

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Solution

The fourth proportional to 630,397.28, 869,917.92 and 343,900.28 is: 474,565.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,397.28 : 869,917.92 = 343,900.28 : x
  2. Step 2: Convert to fraction form
    630,397.28/869,917.92 = 343,900.28/x
  3. Step 3: Cross multiply
    630,397.28x = 869,917.92 × 343,900.28
  4. Step 4: Simplify right side
    630,397.28x = 299,165,016,265.02
  5. Step 5: Solve for x
    x = 299,165,016,265.02/630,397.28
  6. Step 6: Final answer
    x = 474,565.84

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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.