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Finding the Fourth Proportional to 659,391.30, 989,076.15 and 210,106.10

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Solution

The fourth proportional to 659,391.30, 989,076.15 and 210,106.10 is: 315,155.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,391.30 : 989,076.15 = 210,106.10 : x
  2. Step 2: Convert to fraction form
    659,391.30/989,076.15 = 210,106.10/x
  3. Step 3: Cross multiply
    659,391.30x = 989,076.15 × 210,106.10
  4. Step 4: Simplify right side
    659,391.30x = 207,810,934,952.21
  5. Step 5: Solve for x
    x = 207,810,934,952.21/659,391.30
  6. Step 6: Final answer
    x = 315,155.71

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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.