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Finding the Fourth Proportional to 913.06, 1,259.31 and 558.69

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Solution

The fourth proportional to 913.06, 1,259.31 and 558.69 is: 770.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.06 : 1,259.31 = 558.69 : x
  2. Step 2: Convert to fraction form
    913.06/1,259.31 = 558.69/x
  3. Step 3: Cross multiply
    913.06x = 1,259.31 × 558.69
  4. Step 4: Simplify right side
    913.06x = 703,563.90
  5. Step 5: Solve for x
    x = 703,563.90/913.06
  6. Step 6: Final answer
    x = 770.56

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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.