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Finding the Fourth Proportional to 494.01, 681.64 and 317.00

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Solution

The fourth proportional to 494.01, 681.64 and 317.00 is: 437.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.01 : 681.64 = 317.00 : x
  2. Step 2: Convert to fraction form
    494.01/681.64 = 317.00/x
  3. Step 3: Cross multiply
    494.01x = 681.64 × 317.00
  4. Step 4: Simplify right side
    494.01x = 216,080.79
  5. Step 5: Solve for x
    x = 216,080.79/494.01
  6. Step 6: Final answer
    x = 437.40

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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.