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Finding the Fourth Proportional to 312,347.52, 431,044.80 and 191,441.28

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Solution

The fourth proportional to 312,347.52, 431,044.80 and 191,441.28 is: 264,192.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,347.52 : 431,044.80 = 191,441.28 : x
  2. Step 2: Convert to fraction form
    312,347.52/431,044.80 = 191,441.28/x
  3. Step 3: Cross multiply
    312,347.52x = 431,044.80 × 191,441.28
  4. Step 4: Simplify right side
    312,347.52x = 82,519,768,249.34
  5. Step 5: Solve for x
    x = 82,519,768,249.34/312,347.52
  6. Step 6: Final answer
    x = 264,192.17

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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.