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Finding the Fourth Proportional to 315,395.38, 435,247.41 and 172,152.28

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Solution

The fourth proportional to 315,395.38, 435,247.41 and 172,152.28 is: 237,571.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,395.38 : 435,247.41 = 172,152.28 : x
  2. Step 2: Convert to fraction form
    315,395.38/435,247.41 = 172,152.28/x
  3. Step 3: Cross multiply
    315,395.38x = 435,247.41 × 172,152.28
  4. Step 4: Simplify right side
    315,395.38x = 74,928,833,995.59
  5. Step 5: Solve for x
    x = 74,928,833,995.59/315,395.38
  6. Step 6: Final answer
    x = 237,571.12

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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.