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Finding the Fourth Proportional to 315,313.83, 435,142.26 and 172,083.12

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Solution

The fourth proportional to 315,313.83, 435,142.26 and 172,083.12 is: 237,479.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,313.83 : 435,142.26 = 172,083.12 : x
  2. Step 2: Convert to fraction form
    315,313.83/435,142.26 = 172,083.12/x
  3. Step 3: Cross multiply
    315,313.83x = 435,142.26 × 172,083.12
  4. Step 4: Simplify right side
    315,313.83x = 74,880,637,744.65
  5. Step 5: Solve for x
    x = 74,880,637,744.65/315,313.83
  6. Step 6: Final answer
    x = 237,479.71

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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.