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Finding the Fourth Proportional to 315,585.54, 435,505.83 and 172,345.62

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Solution

The fourth proportional to 315,585.54, 435,505.83 and 172,345.62 is: 237,835.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,585.54 : 435,505.83 = 172,345.62 : x
  2. Step 2: Convert to fraction form
    315,585.54/435,505.83 = 172,345.62/x
  3. Step 3: Cross multiply
    315,585.54x = 435,505.83 × 172,345.62
  4. Step 4: Simplify right side
    315,585.54x = 75,057,522,284.96
  5. Step 5: Solve for x
    x = 75,057,522,284.96/315,585.54
  6. Step 6: Final answer
    x = 237,835.75

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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.