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Finding the Fourth Proportional to 486.60, 672.18 and 472.20

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Solution

The fourth proportional to 486.60, 672.18 and 472.20 is: 652.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.60 : 672.18 = 472.20 : x
  2. Step 2: Convert to fraction form
    486.60/672.18 = 472.20/x
  3. Step 3: Cross multiply
    486.60x = 672.18 × 472.20
  4. Step 4: Simplify right side
    486.60x = 317,403.40
  5. Step 5: Solve for x
    x = 317,403.40/486.60
  6. Step 6: Final answer
    x = 652.29

Related Problems

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1.5x scale

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.