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Finding the Fourth Proportional to 739.63, 1,020.75 and 424.95

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Solution

The fourth proportional to 739.63, 1,020.75 and 424.95 is: 586.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.63 : 1,020.75 = 424.95 : x
  2. Step 2: Convert to fraction form
    739.63/1,020.75 = 424.95/x
  3. Step 3: Cross multiply
    739.63x = 1,020.75 × 424.95
  4. Step 4: Simplify right side
    739.63x = 433,764.68
  5. Step 5: Solve for x
    x = 433,764.68/739.63
  6. Step 6: Final answer
    x = 586.46

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Double scale
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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.