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Finding the Fourth Proportional to 479,417.88, 661,317.32 and 307,274.52

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Solution

The fourth proportional to 479,417.88, 661,317.32 and 307,274.52 is: 423,859.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,417.88 : 661,317.32 = 307,274.52 : x
  2. Step 2: Convert to fraction form
    479,417.88/661,317.32 = 307,274.52/x
  3. Step 3: Cross multiply
    479,417.88x = 661,317.32 × 307,274.52
  4. Step 4: Simplify right side
    479,417.88x = 203,205,962,070.69
  5. Step 5: Solve for x
    x = 203,205,962,070.69/479,417.88
  6. Step 6: Final answer
    x = 423,859.79

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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.