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Finding the Fourth Proportional to 534,784.80, 738,003.06 and 308,430.30

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Solution

The fourth proportional to 534,784.80, 738,003.06 and 308,430.30 is: 425,633.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    534,784.80 : 738,003.06 = 308,430.30 : x
  2. Step 2: Convert to fraction form
    534,784.80/738,003.06 = 308,430.30/x
  3. Step 3: Cross multiply
    534,784.80x = 738,003.06 × 308,430.30
  4. Step 4: Simplify right side
    534,784.80x = 227,622,505,196.72
  5. Step 5: Solve for x
    x = 227,622,505,196.72/534,784.80
  6. Step 6: Final answer
    x = 425,633.83

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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.