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Finding the Fourth Proportional to 659,591.70, 989,443.03 and 210,376.43

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Solution

The fourth proportional to 659,591.70, 989,443.03 and 210,376.43 is: 315,582.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,591.70 : 989,443.03 = 210,376.43 : x
  2. Step 2: Convert to fraction form
    659,591.70/989,443.03 = 210,376.43/x
  3. Step 3: Cross multiply
    659,591.70x = 989,443.03 × 210,376.43
  4. Step 4: Simplify right side
    659,591.70x = 208,155,492,339.78
  5. Step 5: Solve for x
    x = 208,155,492,339.78/659,591.70
  6. Step 6: Final answer
    x = 315,582.34

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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.