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Finding the Fourth Proportional to 487.08, 671.79 and 310.07

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Solution

The fourth proportional to 487.08, 671.79 and 310.07 is: 427.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.08 : 671.79 = 310.07 : x
  2. Step 2: Convert to fraction form
    487.08/671.79 = 310.07/x
  3. Step 3: Cross multiply
    487.08x = 671.79 × 310.07
  4. Step 4: Simplify right side
    487.08x = 208,299.34
  5. Step 5: Solve for x
    x = 208,299.34/487.08
  6. Step 6: Final answer
    x = 427.65

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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.