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Finding the Fourth Proportional to 315,585.45, 435,511.39 and 172,349.71

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Solution

The fourth proportional to 315,585.45, 435,511.39 and 172,349.71 is: 237,844.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,585.45 : 435,511.39 = 172,349.71 : x
  2. Step 2: Convert to fraction form
    315,585.45/435,511.39 = 172,349.71/x
  3. Step 3: Cross multiply
    315,585.45x = 435,511.39 × 172,349.71
  4. Step 4: Simplify right side
    315,585.45x = 75,060,261,768.20
  5. Step 5: Solve for x
    x = 75,060,261,768.20/315,585.45
  6. Step 6: Final answer
    x = 237,844.49

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1.5x scale

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.