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Finding the Fourth Proportional to 485,060.58, 669,390.56 and 278,362.66

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Solution

The fourth proportional to 485,060.58, 669,390.56 and 278,362.66 is: 384,144.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,060.58 : 669,390.56 = 278,362.66 : x
  2. Step 2: Convert to fraction form
    485,060.58/669,390.56 = 278,362.66/x
  3. Step 3: Cross multiply
    485,060.58x = 669,390.56 × 278,362.66
  4. Step 4: Simplify right side
    485,060.58x = 186,333,336,860.49
  5. Step 5: Solve for x
    x = 186,333,336,860.49/485,060.58
  6. Step 6: Final answer
    x = 384,144.46

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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.