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Finding the Fourth Proportional to 660,520.22, 989,098.38 and 435,197.54

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Solution

The fourth proportional to 660,520.22, 989,098.38 and 435,197.54 is: 651,688.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,520.22 : 989,098.38 = 435,197.54 : x
  2. Step 2: Convert to fraction form
    660,520.22/989,098.38 = 435,197.54/x
  3. Step 3: Cross multiply
    660,520.22x = 989,098.38 × 435,197.54
  4. Step 4: Simplify right side
    660,520.22x = 430,453,181,793.99
  5. Step 5: Solve for x
    x = 430,453,181,793.99/660,520.22
  6. Step 6: Final answer
    x = 651,688.12

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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.