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Finding the Fourth Proportional to 577.66, 865.40 and 289.30

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Solution

The fourth proportional to 577.66, 865.40 and 289.30 is: 433.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.66 : 865.40 = 289.30 : x
  2. Step 2: Convert to fraction form
    577.66/865.40 = 289.30/x
  3. Step 3: Cross multiply
    577.66x = 865.40 × 289.30
  4. Step 4: Simplify right side
    577.66x = 250,360.22
  5. Step 5: Solve for x
    x = 250,360.22/577.66
  6. Step 6: Final answer
    x = 433.40

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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.