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Finding the Fourth Proportional to 386.24, 577.10 and 339.36

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Solution

The fourth proportional to 386.24, 577.10 and 339.36 is: 507.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.24 : 577.10 = 339.36 : x
  2. Step 2: Convert to fraction form
    386.24/577.10 = 339.36/x
  3. Step 3: Cross multiply
    386.24x = 577.10 × 339.36
  4. Step 4: Simplify right side
    386.24x = 195,844.66
  5. Step 5: Solve for x
    x = 195,844.66/386.24
  6. Step 6: Final answer
    x = 507.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.