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Finding the Fourth Proportional to 479,421.69, 661,400.64 and 336,275.25

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Solution

The fourth proportional to 479,421.69, 661,400.64 and 336,275.25 is: 463,918.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,421.69 : 661,400.64 = 336,275.25 : x
  2. Step 2: Convert to fraction form
    479,421.69/661,400.64 = 336,275.25/x
  3. Step 3: Cross multiply
    479,421.69x = 661,400.64 × 336,275.25
  4. Step 4: Simplify right side
    479,421.69x = 222,412,665,566.16
  5. Step 5: Solve for x
    x = 222,412,665,566.16/479,421.69
  6. Step 6: Final answer
    x = 463,918.65

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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.