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Finding the Fourth Proportional to 485.88, 670.22 and 296.74

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Solution

The fourth proportional to 485.88, 670.22 and 296.74 is: 409.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.88 : 670.22 = 296.74 : x
  2. Step 2: Convert to fraction form
    485.88/670.22 = 296.74/x
  3. Step 3: Cross multiply
    485.88x = 670.22 × 296.74
  4. Step 4: Simplify right side
    485.88x = 198,880.29
  5. Step 5: Solve for x
    x = 198,880.29/485.88
  6. Step 6: Final answer
    x = 409.32

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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.