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Finding the Fourth Proportional to 684.63, 942.98 and 632.70

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Solution

The fourth proportional to 684.63, 942.98 and 632.70 is: 871.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.63 : 942.98 = 632.70 : x
  2. Step 2: Convert to fraction form
    684.63/942.98 = 632.70/x
  3. Step 3: Cross multiply
    684.63x = 942.98 × 632.70
  4. Step 4: Simplify right side
    684.63x = 596,620.28
  5. Step 5: Solve for x
    x = 596,620.28/684.63
  6. Step 6: Final answer
    x = 871.45

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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.