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Finding the Fourth Proportional to 548.16, 821.61 and 223.17

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Solution

The fourth proportional to 548.16, 821.61 and 223.17 is: 334.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.16 : 821.61 = 223.17 : x
  2. Step 2: Convert to fraction form
    548.16/821.61 = 223.17/x
  3. Step 3: Cross multiply
    548.16x = 821.61 × 223.17
  4. Step 4: Simplify right side
    548.16x = 183,358.70
  5. Step 5: Solve for x
    x = 183,358.70/548.16
  6. Step 6: Final answer
    x = 334.50

Related Problems

Find fourth proportional to 274.08, 410.81 and 111.59
Half scale
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Double scale
Find fourth proportional to 549.16, 823.11 and 224.17
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.