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Finding the Fourth Proportional to 315,824.28, 435,819 and 172,585.44

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Solution

The fourth proportional to 315,824.28, 435,819 and 172,585.44 is: 238,157.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,824.28 : 435,819 = 172,585.44 : x
  2. Step 2: Convert to fraction form
    315,824.28/435,819 = 172,585.44/x
  3. Step 3: Cross multiply
    315,824.28x = 435,819 × 172,585.44
  4. Step 4: Simplify right side
    315,824.28x = 75,216,013,875.36
  5. Step 5: Solve for x
    x = 75,216,013,875.36/315,824.28
  6. Step 6: Final answer
    x = 238,157.79

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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.