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Finding the Fourth Proportional to 530,939.88, 732,690.72 and 289,221.84

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Solution

The fourth proportional to 530,939.88, 732,690.72 and 289,221.84 is: 399,122.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,939.88 : 732,690.72 = 289,221.84 : x
  2. Step 2: Convert to fraction form
    530,939.88/732,690.72 = 289,221.84/x
  3. Step 3: Cross multiply
    530,939.88x = 732,690.72 × 289,221.84
  4. Step 4: Simplify right side
    530,939.88x = 211,910,158,189.33
  5. Step 5: Solve for x
    x = 211,910,158,189.33/530,939.88
  6. Step 6: Final answer
    x = 399,122.70

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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.