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Finding the Fourth Proportional to 571.90, 789.52 and 386.36

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Solution

The fourth proportional to 571.90, 789.52 and 386.36 is: 533.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.90 : 789.52 = 386.36 : x
  2. Step 2: Convert to fraction form
    571.90/789.52 = 386.36/x
  3. Step 3: Cross multiply
    571.90x = 789.52 × 386.36
  4. Step 4: Simplify right side
    571.90x = 305,038.95
  5. Step 5: Solve for x
    x = 305,038.95/571.90
  6. Step 6: Final answer
    x = 533.38

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Double scale
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1.5x scale

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.