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Finding the Fourth Proportional to 399,630.68, 599,872.74 and 172,038.94

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Solution

The fourth proportional to 399,630.68, 599,872.74 and 172,038.94 is: 258,242.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,630.68 : 599,872.74 = 172,038.94 : x
  2. Step 2: Convert to fraction form
    399,630.68/599,872.74 = 172,038.94/x
  3. Step 3: Cross multiply
    399,630.68x = 599,872.74 × 172,038.94
  4. Step 4: Simplify right side
    399,630.68x = 103,201,468,824.81
  5. Step 5: Solve for x
    x = 103,201,468,824.81/399,630.68
  6. Step 6: Final answer
    x = 258,242.11

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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.