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Finding the Fourth Proportional to 315,266.38, 435,063.98 and 172,028.81

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Solution

The fourth proportional to 315,266.38, 435,063.98 and 172,028.81 is: 237,397.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,266.38 : 435,063.98 = 172,028.81 : x
  2. Step 2: Convert to fraction form
    315,266.38/435,063.98 = 172,028.81/x
  3. Step 3: Cross multiply
    315,266.38x = 435,063.98 × 172,028.81
  4. Step 4: Simplify right side
    315,266.38x = 74,843,540,271.00
  5. Step 5: Solve for x
    x = 74,843,540,271.00/315,266.38
  6. Step 6: Final answer
    x = 237,397.79

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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.