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Finding the Fourth Proportional to 315,328.62, 435,154.80 and 172,091.70

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Solution

The fourth proportional to 315,328.62, 435,154.80 and 172,091.70 is: 237,487.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,328.62 : 435,154.80 = 172,091.70 : x
  2. Step 2: Convert to fraction form
    315,328.62/435,154.80 = 172,091.70/x
  3. Step 3: Cross multiply
    315,328.62x = 435,154.80 × 172,091.70
  4. Step 4: Simplify right side
    315,328.62x = 74,886,529,295.16
  5. Step 5: Solve for x
    x = 74,886,529,295.16/315,328.62
  6. Step 6: Final answer
    x = 237,487.26

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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.