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Finding the Fourth Proportional to 528,049.40, 791,490.90 and 291,561.80

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Solution

The fourth proportional to 528,049.40, 791,490.90 and 291,561.80 is: 437,020.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,049.40 : 791,490.90 = 291,561.80 : x
  2. Step 2: Convert to fraction form
    528,049.40/791,490.90 = 291,561.80/x
  3. Step 3: Cross multiply
    528,049.40x = 791,490.90 × 291,561.80
  4. Step 4: Simplify right side
    528,049.40x = 230,768,511,487.62
  5. Step 5: Solve for x
    x = 230,768,511,487.62/528,049.40
  6. Step 6: Final answer
    x = 437,020.69

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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.