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Finding the Fourth Proportional to 315,480.96, 435,352.32 and 172,238.40

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Solution

The fourth proportional to 315,480.96, 435,352.32 and 172,238.40 is: 237,682.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,480.96 : 435,352.32 = 172,238.40 : x
  2. Step 2: Convert to fraction form
    315,480.96/435,352.32 = 172,238.40/x
  3. Step 3: Cross multiply
    315,480.96x = 435,352.32 × 172,238.40
  4. Step 4: Simplify right side
    315,480.96x = 74,984,387,033.09
  5. Step 5: Solve for x
    x = 74,984,387,033.09/315,480.96
  6. Step 6: Final answer
    x = 237,682.77

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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.