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Finding the Fourth Proportional to 572.64, 790.19 and 386.10

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Solution

The fourth proportional to 572.64, 790.19 and 386.10 is: 532.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.64 : 790.19 = 386.10 : x
  2. Step 2: Convert to fraction form
    572.64/790.19 = 386.10/x
  3. Step 3: Cross multiply
    572.64x = 790.19 × 386.10
  4. Step 4: Simplify right side
    572.64x = 305,090.43
  5. Step 5: Solve for x
    x = 305,090.43/572.64
  6. Step 6: Final answer
    x = 532.78

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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.