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Finding the Fourth Proportional to 630,950.96, 870,812.30 and 401,268.78

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Solution

The fourth proportional to 630,950.96, 870,812.30 and 401,268.78 is: 553,814.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,950.96 : 870,812.30 = 401,268.78 : x
  2. Step 2: Convert to fraction form
    630,950.96/870,812.30 = 401,268.78/x
  3. Step 3: Cross multiply
    630,950.96x = 870,812.30 × 401,268.78
  4. Step 4: Simplify right side
    630,950.96x = 349,429,789,229.99
  5. Step 5: Solve for x
    x = 349,429,789,229.99/630,950.96
  6. Step 6: Final answer
    x = 553,814.50

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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.