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Finding the Fourth Proportional to 534,991.56, 738,296.74 and 320,140.68

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Solution

The fourth proportional to 534,991.56, 738,296.74 and 320,140.68 is: 441,799.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    534,991.56 : 738,296.74 = 320,140.68 : x
  2. Step 2: Convert to fraction form
    534,991.56/738,296.74 = 320,140.68/x
  3. Step 3: Cross multiply
    534,991.56x = 738,296.74 × 320,140.68
  4. Step 4: Simplify right side
    534,991.56x = 236,358,820,385.38
  5. Step 5: Solve for x
    x = 236,358,820,385.38/534,991.56
  6. Step 6: Final answer
    x = 441,799.16

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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.