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Finding the Fourth Proportional to 437.39, 603.78 and 313.10

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Solution

The fourth proportional to 437.39, 603.78 and 313.10 is: 432.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.39 : 603.78 = 313.10 : x
  2. Step 2: Convert to fraction form
    437.39/603.78 = 313.10/x
  3. Step 3: Cross multiply
    437.39x = 603.78 × 313.10
  4. Step 4: Simplify right side
    437.39x = 189,043.52
  5. Step 5: Solve for x
    x = 189,043.52/437.39
  6. Step 6: Final answer
    x = 432.21

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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.