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Finding the Fourth Proportional to 483.18, 666.54 and 317.40

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Solution

The fourth proportional to 483.18, 666.54 and 317.40 is: 437.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.18 : 666.54 = 317.40 : x
  2. Step 2: Convert to fraction form
    483.18/666.54 = 317.40/x
  3. Step 3: Cross multiply
    483.18x = 666.54 × 317.40
  4. Step 4: Simplify right side
    483.18x = 211,559.80
  5. Step 5: Solve for x
    x = 211,559.80/483.18
  6. Step 6: Final answer
    x = 437.85

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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.