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Finding the Fourth Proportional to 417.76, 577.80 and 374.08

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Solution

The fourth proportional to 417.76, 577.80 and 374.08 is: 517.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.76 : 577.80 = 374.08 : x
  2. Step 2: Convert to fraction form
    417.76/577.80 = 374.08/x
  3. Step 3: Cross multiply
    417.76x = 577.80 × 374.08
  4. Step 4: Simplify right side
    417.76x = 216,143.42
  5. Step 5: Solve for x
    x = 216,143.42/417.76
  6. Step 6: Final answer
    x = 517.39

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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.