Home / 445,109.52-613,916.28-309,143.64

Finding the Fourth Proportional to 445,109.52, 613,916.28 and 309,143.64

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Solution

The fourth proportional to 445,109.52, 613,916.28 and 309,143.64 is: 426,385.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,109.52 : 613,916.28 = 309,143.64 : x
  2. Step 2: Convert to fraction form
    445,109.52/613,916.28 = 309,143.64/x
  3. Step 3: Cross multiply
    445,109.52x = 613,916.28 × 309,143.64
  4. Step 4: Simplify right side
    445,109.52x = 189,788,313,454.46
  5. Step 5: Solve for x
    x = 189,788,313,454.46/445,109.52
  6. Step 6: Final answer
    x = 426,385.65

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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.