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Finding the Fourth Proportional to 487.45, 730.63 and 313.57

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Solution

The fourth proportional to 487.45, 730.63 and 313.57 is: 470.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.45 : 730.63 = 313.57 : x
  2. Step 2: Convert to fraction form
    487.45/730.63 = 313.57/x
  3. Step 3: Cross multiply
    487.45x = 730.63 × 313.57
  4. Step 4: Simplify right side
    487.45x = 229,103.65
  5. Step 5: Solve for x
    x = 229,103.65/487.45
  6. Step 6: Final answer
    x = 470.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.