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Finding the Fourth Proportional to 320,700.52, 442,274.34 and 275,364.28

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Solution

The fourth proportional to 320,700.52, 442,274.34 and 275,364.28 is: 379,751.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,700.52 : 442,274.34 = 275,364.28 : x
  2. Step 2: Convert to fraction form
    320,700.52/442,274.34 = 275,364.28/x
  3. Step 3: Cross multiply
    320,700.52x = 442,274.34 × 275,364.28
  4. Step 4: Simplify right side
    320,700.52x = 121,786,555,196.58
  5. Step 5: Solve for x
    x = 121,786,555,196.58/320,700.52
  6. Step 6: Final answer
    x = 379,751.66

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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.