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Finding the Fourth Proportional to 402,884.69, 555,981.98 and 221,615.19

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Solution

The fourth proportional to 402,884.69, 555,981.98 and 221,615.19 is: 305,829.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,884.69 : 555,981.98 = 221,615.19 : x
  2. Step 2: Convert to fraction form
    402,884.69/555,981.98 = 221,615.19/x
  3. Step 3: Cross multiply
    402,884.69x = 555,981.98 × 221,615.19
  4. Step 4: Simplify right side
    402,884.69x = 123,214,051,026.20
  5. Step 5: Solve for x
    x = 123,214,051,026.20/402,884.69
  6. Step 6: Final answer
    x = 305,829.57

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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.