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Finding the Fourth Proportional to 315,776.30, 435,774.36 and 172,536.33

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Solution

The fourth proportional to 315,776.30, 435,774.36 and 172,536.33 is: 238,101.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,776.30 : 435,774.36 = 172,536.33 : x
  2. Step 2: Convert to fraction form
    315,776.30/435,774.36 = 172,536.33/x
  3. Step 3: Cross multiply
    315,776.30x = 435,774.36 × 172,536.33
  4. Step 4: Simplify right side
    315,776.30x = 75,186,907,156.66
  5. Step 5: Solve for x
    x = 75,186,907,156.66/315,776.30
  6. Step 6: Final answer
    x = 238,101.81

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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.