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Finding the Fourth Proportional to 550,830.88, 760,101.20 and 389,780.32

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Solution

The fourth proportional to 550,830.88, 760,101.20 and 389,780.32 is: 537,864.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,830.88 : 760,101.20 = 389,780.32 : x
  2. Step 2: Convert to fraction form
    550,830.88/760,101.20 = 389,780.32/x
  3. Step 3: Cross multiply
    550,830.88x = 760,101.20 × 389,780.32
  4. Step 4: Simplify right side
    550,830.88x = 296,272,488,968.38
  5. Step 5: Solve for x
    x = 296,272,488,968.38/550,830.88
  6. Step 6: Final answer
    x = 537,864.71

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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.