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Finding the Fourth Proportional to 509.93, 703.64 and 313.39

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Solution

The fourth proportional to 509.93, 703.64 and 313.39 is: 432.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    509.93 : 703.64 = 313.39 : x
  2. Step 2: Convert to fraction form
    509.93/703.64 = 313.39/x
  3. Step 3: Cross multiply
    509.93x = 703.64 × 313.39
  4. Step 4: Simplify right side
    509.93x = 220,508.65
  5. Step 5: Solve for x
    x = 220,508.65/509.93
  6. Step 6: Final answer
    x = 432.43

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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.