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Finding the Fourth Proportional to 660,520.72, 989,099.13 and 435,198.04

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Solution

The fourth proportional to 660,520.72, 989,099.13 and 435,198.04 is: 651,688.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,520.72 : 989,099.13 = 435,198.04 : x
  2. Step 2: Convert to fraction form
    660,520.72/989,099.13 = 435,198.04/x
  3. Step 3: Cross multiply
    660,520.72x = 989,099.13 × 435,198.04
  4. Step 4: Simplify right side
    660,520.72x = 430,454,002,741.71
  5. Step 5: Solve for x
    x = 430,454,002,741.71/660,520.72
  6. Step 6: Final answer
    x = 651,688.87

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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.