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Finding the Fourth Proportional to 684.04, 944.02 and 389.40

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Solution

The fourth proportional to 684.04, 944.02 and 389.40 is: 537.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.04 : 944.02 = 389.40 : x
  2. Step 2: Convert to fraction form
    684.04/944.02 = 389.40/x
  3. Step 3: Cross multiply
    684.04x = 944.02 × 389.40
  4. Step 4: Simplify right side
    684.04x = 367,601.39
  5. Step 5: Solve for x
    x = 367,601.39/684.04
  6. Step 6: Final answer
    x = 537.40

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Double scale
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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.