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Finding the Fourth Proportional to 315,267.38, 435,065.36 and 172,029.81

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Solution

The fourth proportional to 315,267.38, 435,065.36 and 172,029.81 is: 237,399.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,267.38 : 435,065.36 = 172,029.81 : x
  2. Step 2: Convert to fraction form
    315,267.38/435,065.36 = 172,029.81/x
  3. Step 3: Cross multiply
    315,267.38x = 435,065.36 × 172,029.81
  4. Step 4: Simplify right side
    315,267.38x = 74,844,211,218.38
  5. Step 5: Solve for x
    x = 74,844,211,218.38/315,267.38
  6. Step 6: Final answer
    x = 237,399.16

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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.