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Finding the Fourth Proportional to 739.56, 1,020.34 and 507.08

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Solution

The fourth proportional to 739.56, 1,020.34 and 507.08 is: 699.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.56 : 1,020.34 = 507.08 : x
  2. Step 2: Convert to fraction form
    739.56/1,020.34 = 507.08/x
  3. Step 3: Cross multiply
    739.56x = 1,020.34 × 507.08
  4. Step 4: Simplify right side
    739.56x = 517,394.01
  5. Step 5: Solve for x
    x = 517,394.01/739.56
  6. Step 6: Final answer
    x = 699.60

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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.