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Finding the Fourth Proportional to 430,998.87, 646,599.61 and 131,479.50

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Solution

The fourth proportional to 430,998.87, 646,599.61 and 131,479.50 is: 197,250.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,998.87 : 646,599.61 = 131,479.50 : x
  2. Step 2: Convert to fraction form
    430,998.87/646,599.61 = 131,479.50/x
  3. Step 3: Cross multiply
    430,998.87x = 646,599.61 × 131,479.50
  4. Step 4: Simplify right side
    430,998.87x = 85,014,596,012.09
  5. Step 5: Solve for x
    x = 85,014,596,012.09/430,998.87
  6. Step 6: Final answer
    x = 197,250.16

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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.