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Finding the Fourth Proportional to 315,442.48, 435,318.08 and 172,203.60

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Solution

The fourth proportional to 315,442.48, 435,318.08 and 172,203.60 is: 237,645.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,442.48 : 435,318.08 = 172,203.60 : x
  2. Step 2: Convert to fraction form
    315,442.48/435,318.08 = 172,203.60/x
  3. Step 3: Cross multiply
    315,442.48x = 435,318.08 × 172,203.60
  4. Step 4: Simplify right side
    315,442.48x = 74,963,340,521.09
  5. Step 5: Solve for x
    x = 74,963,340,521.09/315,442.48
  6. Step 6: Final answer
    x = 237,645.04

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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.