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Finding the Fourth Proportional to 630.72, 869.94 and 434.30

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Solution

The fourth proportional to 630.72, 869.94 and 434.30 is: 599.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.72 : 869.94 = 434.30 : x
  2. Step 2: Convert to fraction form
    630.72/869.94 = 434.30/x
  3. Step 3: Cross multiply
    630.72x = 869.94 × 434.30
  4. Step 4: Simplify right side
    630.72x = 377,810.59
  5. Step 5: Solve for x
    x = 377,810.59/630.72
  6. Step 6: Final answer
    x = 599.01

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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.