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Finding the Fourth Proportional to 547.36, 821.04 and 386.32

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Solution

The fourth proportional to 547.36, 821.04 and 386.32 is: 579.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    547.36 : 821.04 = 386.32 : x
  2. Step 2: Convert to fraction form
    547.36/821.04 = 386.32/x
  3. Step 3: Cross multiply
    547.36x = 821.04 × 386.32
  4. Step 4: Simplify right side
    547.36x = 317,184.17
  5. Step 5: Solve for x
    x = 317,184.17/547.36
  6. Step 6: Final answer
    x = 579.48

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Double scale
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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.