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Finding the Fourth Proportional to 535.16, 803.98 and 318.90

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Solution

The fourth proportional to 535.16, 803.98 and 318.90 is: 479.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.16 : 803.98 = 318.90 : x
  2. Step 2: Convert to fraction form
    535.16/803.98 = 318.90/x
  3. Step 3: Cross multiply
    535.16x = 803.98 × 318.90
  4. Step 4: Simplify right side
    535.16x = 256,389.22
  5. Step 5: Solve for x
    x = 256,389.22/535.16
  6. Step 6: Final answer
    x = 479.09

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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.