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Finding the Fourth Proportional to 289,008.47, 398,916.98 and 168,203.45

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Solution

The fourth proportional to 289,008.47, 398,916.98 and 168,203.45 is: 232,170.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,008.47 : 398,916.98 = 168,203.45 : x
  2. Step 2: Convert to fraction form
    289,008.47/398,916.98 = 168,203.45/x
  3. Step 3: Cross multiply
    289,008.47x = 398,916.98 × 168,203.45
  4. Step 4: Simplify right side
    289,008.47x = 67,099,212,299.58
  5. Step 5: Solve for x
    x = 67,099,212,299.58/289,008.47
  6. Step 6: Final answer
    x = 232,170.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.