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Finding the Fourth Proportional to 630,035.81, 869,417.92 and 358,067.78

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Solution

The fourth proportional to 630,035.81, 869,417.92 and 358,067.78 is: 494,115.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,035.81 : 869,417.92 = 358,067.78 : x
  2. Step 2: Convert to fraction form
    630,035.81/869,417.92 = 358,067.78/x
  3. Step 3: Cross multiply
    630,035.81x = 869,417.92 × 358,067.78
  4. Step 4: Simplify right side
    630,035.81x = 311,310,544,506.62
  5. Step 5: Solve for x
    x = 311,310,544,506.62/630,035.81
  6. Step 6: Final answer
    x = 494,115.64

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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.