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Finding the Fourth Proportional to 470.68, 649.64 and 313.03

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Solution

The fourth proportional to 470.68, 649.64 and 313.03 is: 432.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.68 : 649.64 = 313.03 : x
  2. Step 2: Convert to fraction form
    470.68/649.64 = 313.03/x
  3. Step 3: Cross multiply
    470.68x = 649.64 × 313.03
  4. Step 4: Simplify right side
    470.68x = 203,356.81
  5. Step 5: Solve for x
    x = 203,356.81/470.68
  6. Step 6: Final answer
    x = 432.05

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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.