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Finding the Fourth Proportional to 913.32, 1,368.90 and 425.34

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Solution

The fourth proportional to 913.32, 1,368.90 and 425.34 is: 637.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.32 : 1,368.90 = 425.34 : x
  2. Step 2: Convert to fraction form
    913.32/1,368.90 = 425.34/x
  3. Step 3: Cross multiply
    913.32x = 1,368.90 × 425.34
  4. Step 4: Simplify right side
    913.32x = 582,247.93
  5. Step 5: Solve for x
    x = 582,247.93/913.32
  6. Step 6: Final answer
    x = 637.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.