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Finding the Fourth Proportional to 644,059.38, 964,594.17 and 621,639.90

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Solution

The fourth proportional to 644,059.38, 964,594.17 and 621,639.90 is: 931,016.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,059.38 : 964,594.17 = 621,639.90 : x
  2. Step 2: Convert to fraction form
    644,059.38/964,594.17 = 621,639.90/x
  3. Step 3: Cross multiply
    644,059.38x = 964,594.17 × 621,639.90
  4. Step 4: Simplify right side
    644,059.38x = 599,630,223,379.38
  5. Step 5: Solve for x
    x = 599,630,223,379.38/644,059.38
  6. Step 6: Final answer
    x = 931,016.98

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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.