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Finding the Fourth Proportional to 659,395.79, 989,082.77 and 210,110.55

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Solution

The fourth proportional to 659,395.79, 989,082.77 and 210,110.55 is: 315,162.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,395.79 : 989,082.77 = 210,110.55 : x
  2. Step 2: Convert to fraction form
    659,395.79/989,082.77 = 210,110.55/x
  3. Step 3: Cross multiply
    659,395.79x = 989,082.77 × 210,110.55
  4. Step 4: Simplify right side
    659,395.79x = 207,816,724,800.22
  5. Step 5: Solve for x
    x = 207,816,724,800.22/659,395.79
  6. Step 6: Final answer
    x = 315,162.35

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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.