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Finding the Fourth Proportional to 504.94, 697.08 and 318.70

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Solution

The fourth proportional to 504.94, 697.08 and 318.70 is: 439.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.94 : 697.08 = 318.70 : x
  2. Step 2: Convert to fraction form
    504.94/697.08 = 318.70/x
  3. Step 3: Cross multiply
    504.94x = 697.08 × 318.70
  4. Step 4: Simplify right side
    504.94x = 222,159.40
  5. Step 5: Solve for x
    x = 222,159.40/504.94
  6. Step 6: Final answer
    x = 439.97

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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.