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Finding the Fourth Proportional to 402,390.52, 555,295.98 and 218,627.44

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Solution

The fourth proportional to 402,390.52, 555,295.98 and 218,627.44 is: 301,704.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,390.52 : 555,295.98 = 218,627.44 : x
  2. Step 2: Convert to fraction form
    402,390.52/555,295.98 = 218,627.44/x
  3. Step 3: Cross multiply
    402,390.52x = 555,295.98 × 218,627.44
  4. Step 4: Simplify right side
    402,390.52x = 121,402,938,549.69
  5. Step 5: Solve for x
    x = 121,402,938,549.69/402,390.52
  6. Step 6: Final answer
    x = 301,704.27

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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.