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Finding the Fourth Proportional to 493,597.19, 681,168.66 and 289,651.54

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Solution

The fourth proportional to 493,597.19, 681,168.66 and 289,651.54 is: 399,721.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,597.19 : 681,168.66 = 289,651.54 : x
  2. Step 2: Convert to fraction form
    493,597.19/681,168.66 = 289,651.54/x
  3. Step 3: Cross multiply
    493,597.19x = 681,168.66 × 289,651.54
  4. Step 4: Simplify right side
    493,597.19x = 197,301,551,368.74
  5. Step 5: Solve for x
    x = 197,301,551,368.74/493,597.19
  6. Step 6: Final answer
    x = 399,721.79

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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.