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Finding the Fourth Proportional to 315,315.72, 435,133.32 and 172,072.62

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Solution

The fourth proportional to 315,315.72, 435,133.32 and 172,072.62 is: 237,458.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,315.72 : 435,133.32 = 172,072.62 : x
  2. Step 2: Convert to fraction form
    315,315.72/435,133.32 = 172,072.62/x
  3. Step 3: Cross multiply
    315,315.72x = 435,133.32 × 172,072.62
  4. Step 4: Simplify right side
    315,315.72x = 74,874,530,421.70
  5. Step 5: Solve for x
    x = 74,874,530,421.70/315,315.72
  6. Step 6: Final answer
    x = 237,458.92

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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.