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Finding the Fourth Proportional to 315,399.64, 435,259.74 and 172,172.92

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Solution

The fourth proportional to 315,399.64, 435,259.74 and 172,172.92 is: 237,603.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,399.64 : 435,259.74 = 172,172.92 : x
  2. Step 2: Convert to fraction form
    315,399.64/435,259.74 = 172,172.92/x
  3. Step 3: Cross multiply
    315,399.64x = 435,259.74 × 172,172.92
  4. Step 4: Simplify right side
    315,399.64x = 74,939,940,394.24
  5. Step 5: Solve for x
    x = 74,939,940,394.24/315,399.64
  6. Step 6: Final answer
    x = 237,603.13

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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.