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Finding the Fourth Proportional to 684.88, 1,025.64 and 437.22

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Solution

The fourth proportional to 684.88, 1,025.64 and 437.22 is: 654.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.88 : 1,025.64 = 437.22 : x
  2. Step 2: Convert to fraction form
    684.88/1,025.64 = 437.22/x
  3. Step 3: Cross multiply
    684.88x = 1,025.64 × 437.22
  4. Step 4: Simplify right side
    684.88x = 448,430.32
  5. Step 5: Solve for x
    x = 448,430.32/684.88
  6. Step 6: Final answer
    x = 654.76

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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.