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Finding the Fourth Proportional to 639.81, 953.64 and 604.53

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Solution

The fourth proportional to 639.81, 953.64 and 604.53 is: 901.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.81 : 953.64 = 604.53 : x
  2. Step 2: Convert to fraction form
    639.81/953.64 = 604.53/x
  3. Step 3: Cross multiply
    639.81x = 953.64 × 604.53
  4. Step 4: Simplify right side
    639.81x = 576,503.99
  5. Step 5: Solve for x
    x = 576,503.99/639.81
  6. Step 6: Final answer
    x = 901.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.