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Finding the Fourth Proportional to 315,455.04, 435,334.53 and 172,221.12

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Solution

The fourth proportional to 315,455.04, 435,334.53 and 172,221.12 is: 237,668.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,455.04 : 435,334.53 = 172,221.12 : x
  2. Step 2: Convert to fraction form
    315,455.04/435,334.53 = 172,221.12/x
  3. Step 3: Cross multiply
    315,455.04x = 435,334.53 × 172,221.12
  4. Step 4: Simplify right side
    315,455.04x = 74,973,800,331.27
  5. Step 5: Solve for x
    x = 74,973,800,331.27/315,455.04
  6. Step 6: Final answer
    x = 237,668.74

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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.