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Finding the Fourth Proportional to 485,706.60, 670,275.74 and 267,910.38

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Solution

The fourth proportional to 485,706.60, 670,275.74 and 267,910.38 is: 369,716.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,706.60 : 670,275.74 = 267,910.38 : x
  2. Step 2: Convert to fraction form
    485,706.60/670,275.74 = 267,910.38/x
  3. Step 3: Cross multiply
    485,706.60x = 670,275.74 × 267,910.38
  4. Step 4: Simplify right side
    485,706.60x = 179,573,828,208.18
  5. Step 5: Solve for x
    x = 179,573,828,208.18/485,706.60
  6. Step 6: Final answer
    x = 369,716.67

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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.