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Finding the Fourth Proportional to 583.44, 803.16 and 499.20

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Solution

The fourth proportional to 583.44, 803.16 and 499.20 is: 687.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.44 : 803.16 = 499.20 : x
  2. Step 2: Convert to fraction form
    583.44/803.16 = 499.20/x
  3. Step 3: Cross multiply
    583.44x = 803.16 × 499.20
  4. Step 4: Simplify right side
    583.44x = 400,937.47
  5. Step 5: Solve for x
    x = 400,937.47/583.44
  6. Step 6: Final answer
    x = 687.20

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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.