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Finding the Fourth Proportional to 578.04, 866.40 and 253

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Solution

The fourth proportional to 578.04, 866.40 and 253 is: 379.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.04 : 866.40 = 253 : x
  2. Step 2: Convert to fraction form
    578.04/866.40 = 253/x
  3. Step 3: Cross multiply
    578.04x = 866.40 × 253
  4. Step 4: Simplify right side
    578.04x = 219,199.20
  5. Step 5: Solve for x
    x = 219,199.20/578.04
  6. Step 6: Final answer
    x = 379.21

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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.