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Finding the Fourth Proportional to 577.64, 797.16 and 315.68

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Solution

The fourth proportional to 577.64, 797.16 and 315.68 is: 435.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.64 : 797.16 = 315.68 : x
  2. Step 2: Convert to fraction form
    577.64/797.16 = 315.68/x
  3. Step 3: Cross multiply
    577.64x = 797.16 × 315.68
  4. Step 4: Simplify right side
    577.64x = 251,647.47
  5. Step 5: Solve for x
    x = 251,647.47/577.64
  6. Step 6: Final answer
    x = 435.65

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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.