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Finding the Fourth Proportional to 659,442.70, 989,145.51 and 210,190.49

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Solution

The fourth proportional to 659,442.70, 989,145.51 and 210,190.49 is: 315,279.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,442.70 : 989,145.51 = 210,190.49 : x
  2. Step 2: Convert to fraction form
    659,442.70/989,145.51 = 210,190.49/x
  3. Step 3: Cross multiply
    659,442.70x = 989,145.51 × 210,190.49
  4. Step 4: Simplify right side
    659,442.70x = 207,908,979,428.20
  5. Step 5: Solve for x
    x = 207,908,979,428.20/659,442.70
  6. Step 6: Final answer
    x = 315,279.83

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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.