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Finding the Fourth Proportional to 386.74, 577.58 and 347.86

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Solution

The fourth proportional to 386.74, 577.58 and 347.86 is: 519.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.74 : 577.58 = 347.86 : x
  2. Step 2: Convert to fraction form
    386.74/577.58 = 347.86/x
  3. Step 3: Cross multiply
    386.74x = 577.58 × 347.86
  4. Step 4: Simplify right side
    386.74x = 200,916.98
  5. Step 5: Solve for x
    x = 200,916.98/386.74
  6. Step 6: Final answer
    x = 519.51

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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.