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Finding the Fourth Proportional to 569.16, 854.16 and 386.91

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Solution

The fourth proportional to 569.16, 854.16 and 386.91 is: 580.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.16 : 854.16 = 386.91 : x
  2. Step 2: Convert to fraction form
    569.16/854.16 = 386.91/x
  3. Step 3: Cross multiply
    569.16x = 854.16 × 386.91
  4. Step 4: Simplify right side
    569.16x = 330,483.05
  5. Step 5: Solve for x
    x = 330,483.05/569.16
  6. Step 6: Final answer
    x = 580.65

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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.