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Finding the Fourth Proportional to 659,654.50, 989,432.06 and 210,357.22

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Solution

The fourth proportional to 659,654.50, 989,432.06 and 210,357.22 is: 315,519.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,654.50 : 989,432.06 = 210,357.22 : x
  2. Step 2: Convert to fraction form
    659,654.50/989,432.06 = 210,357.22/x
  3. Step 3: Cross multiply
    659,654.50x = 989,432.06 × 210,357.22
  4. Step 4: Simplify right side
    659,654.50x = 208,134,177,520.47
  5. Step 5: Solve for x
    x = 208,134,177,520.47/659,654.50
  6. Step 6: Final answer
    x = 315,519.98

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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.