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Finding the Fourth Proportional to 581.18, 869.94 and 434.07

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Solution

The fourth proportional to 581.18, 869.94 and 434.07 is: 649.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.18 : 869.94 = 434.07 : x
  2. Step 2: Convert to fraction form
    581.18/869.94 = 434.07/x
  3. Step 3: Cross multiply
    581.18x = 869.94 × 434.07
  4. Step 4: Simplify right side
    581.18x = 377,614.86
  5. Step 5: Solve for x
    x = 377,614.86/581.18
  6. Step 6: Final answer
    x = 649.74

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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.