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Finding the Fourth Proportional to 865,486.87, 1,298,270.40 and 266,474.86

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Solution

The fourth proportional to 865,486.87, 1,298,270.40 and 266,474.86 is: 399,724.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,486.87 : 1,298,270.40 = 266,474.86 : x
  2. Step 2: Convert to fraction form
    865,486.87/1,298,270.40 = 266,474.86/x
  3. Step 3: Cross multiply
    865,486.87x = 1,298,270.40 × 266,474.86
  4. Step 4: Simplify right side
    865,486.87x = 345,956,423,082.14
  5. Step 5: Solve for x
    x = 345,956,423,082.14/865,486.87
  6. Step 6: Final answer
    x = 399,724.63

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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.