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Finding the Fourth Proportional to 578.08, 867.12 and 253.45

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Solution

The fourth proportional to 578.08, 867.12 and 253.45 is: 380.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.08 : 867.12 = 253.45 : x
  2. Step 2: Convert to fraction form
    578.08/867.12 = 253.45/x
  3. Step 3: Cross multiply
    578.08x = 867.12 × 253.45
  4. Step 4: Simplify right side
    578.08x = 219,771.56
  5. Step 5: Solve for x
    x = 219,771.56/578.08
  6. Step 6: Final answer
    x = 380.18

Related Problems

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Half scale
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Double scale
Find fourth proportional to 579.08, 868.62 and 254.45
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.