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Finding the Fourth Proportional to 912.37, 1,258.32 and 580.22

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Solution

The fourth proportional to 912.37, 1,258.32 and 580.22 is: 800.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.37 : 1,258.32 = 580.22 : x
  2. Step 2: Convert to fraction form
    912.37/1,258.32 = 580.22/x
  3. Step 3: Cross multiply
    912.37x = 1,258.32 × 580.22
  4. Step 4: Simplify right side
    912.37x = 730,102.43
  5. Step 5: Solve for x
    x = 730,102.43/912.37
  6. Step 6: Final answer
    x = 800.23

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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.