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Finding the Fourth Proportional to 684.20, 943.62 and 509.96

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Solution

The fourth proportional to 684.20, 943.62 and 509.96 is: 703.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.20 : 943.62 = 509.96 : x
  2. Step 2: Convert to fraction form
    684.20/943.62 = 509.96/x
  3. Step 3: Cross multiply
    684.20x = 943.62 × 509.96
  4. Step 4: Simplify right side
    684.20x = 481,208.46
  5. Step 5: Solve for x
    x = 481,208.46/684.20
  6. Step 6: Final answer
    x = 703.32

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1.5x scale

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.