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Finding the Fourth Proportional to 485.30, 722.47 and 482.42

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Solution

The fourth proportional to 485.30, 722.47 and 482.42 is: 718.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.30 : 722.47 = 482.42 : x
  2. Step 2: Convert to fraction form
    485.30/722.47 = 482.42/x
  3. Step 3: Cross multiply
    485.30x = 722.47 × 482.42
  4. Step 4: Simplify right side
    485.30x = 348,531.57
  5. Step 5: Solve for x
    x = 348,531.57/485.30
  6. Step 6: Final answer
    x = 718.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.