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Finding the Fourth Proportional to 440.72, 607.80 and 317.18

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Solution

The fourth proportional to 440.72, 607.80 and 317.18 is: 437.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.72 : 607.80 = 317.18 : x
  2. Step 2: Convert to fraction form
    440.72/607.80 = 317.18/x
  3. Step 3: Cross multiply
    440.72x = 607.80 × 317.18
  4. Step 4: Simplify right side
    440.72x = 192,782.00
  5. Step 5: Solve for x
    x = 192,782.00/440.72
  6. Step 6: Final answer
    x = 437.43

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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.