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Finding the Fourth Proportional to 402,651.79, 555,663.08 and 218,890.71

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Solution

The fourth proportional to 402,651.79, 555,663.08 and 218,890.71 is: 302,071.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,651.79 : 555,663.08 = 218,890.71 : x
  2. Step 2: Convert to fraction form
    402,651.79/555,663.08 = 218,890.71/x
  3. Step 3: Cross multiply
    402,651.79x = 555,663.08 × 218,890.71
  4. Step 4: Simplify right side
    402,651.79x = 121,629,486,649.21
  5. Step 5: Solve for x
    x = 121,629,486,649.21/402,651.79
  6. Step 6: Final answer
    x = 302,071.15

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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.