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Finding the Fourth Proportional to 486.50, 670.95 and 437.90

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Solution

The fourth proportional to 486.50, 670.95 and 437.90 is: 603.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.50 : 670.95 = 437.90 : x
  2. Step 2: Convert to fraction form
    486.50/670.95 = 437.90/x
  3. Step 3: Cross multiply
    486.50x = 670.95 × 437.90
  4. Step 4: Simplify right side
    486.50x = 293,805.65
  5. Step 5: Solve for x
    x = 293,805.65/486.50
  6. Step 6: Final answer
    x = 603.92

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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.