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Finding the Fourth Proportional to 684.48, 1,025.60 and 359.68

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Solution

The fourth proportional to 684.48, 1,025.60 and 359.68 is: 538.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.48 : 1,025.60 = 359.68 : x
  2. Step 2: Convert to fraction form
    684.48/1,025.60 = 359.68/x
  3. Step 3: Cross multiply
    684.48x = 1,025.60 × 359.68
  4. Step 4: Simplify right side
    684.48x = 368,887.81
  5. Step 5: Solve for x
    x = 368,887.81/684.48
  6. Step 6: Final answer
    x = 538.93

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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.