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Finding the Fourth Proportional to 315,479.44, 435,363.88 and 172,242.32

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Solution

The fourth proportional to 315,479.44, 435,363.88 and 172,242.32 is: 237,695.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,479.44 : 435,363.88 = 172,242.32 : x
  2. Step 2: Convert to fraction form
    315,479.44/435,363.88 = 172,242.32/x
  3. Step 3: Cross multiply
    315,479.44x = 435,363.88 × 172,242.32
  4. Step 4: Simplify right side
    315,479.44x = 74,988,084,735.40
  5. Step 5: Solve for x
    x = 74,988,084,735.40/315,479.44
  6. Step 6: Final answer
    x = 237,695.63

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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.