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Finding the Fourth Proportional to 315,856.36, 435,882.90 and 172,616.37

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Solution

The fourth proportional to 315,856.36, 435,882.90 and 172,616.37 is: 238,211.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,856.36 : 435,882.90 = 172,616.37 : x
  2. Step 2: Convert to fraction form
    315,856.36/435,882.90 = 172,616.37/x
  3. Step 3: Cross multiply
    315,856.36x = 435,882.90 × 172,616.37
  4. Step 4: Simplify right side
    315,856.36x = 75,240,523,943.07
  5. Step 5: Solve for x
    x = 75,240,523,943.07/315,856.36
  6. Step 6: Final answer
    x = 238,211.20

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1.5x scale

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.