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Finding the Fourth Proportional to 644,079.42, 964,624.16 and 621,659.90

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Solution

The fourth proportional to 644,079.42, 964,624.16 and 621,659.90 is: 931,046.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,079.42 : 964,624.16 = 621,659.90 : x
  2. Step 2: Convert to fraction form
    644,079.42/964,624.16 = 621,659.90/x
  3. Step 3: Cross multiply
    644,079.42x = 964,624.16 × 621,659.90
  4. Step 4: Simplify right side
    644,079.42x = 599,668,158,843.18
  5. Step 5: Solve for x
    x = 599,668,158,843.18/644,079.42
  6. Step 6: Final answer
    x = 931,046.92

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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.