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Finding the Fourth Proportional to 912.32, 1,367.19 and 417.51

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Solution

The fourth proportional to 912.32, 1,367.19 and 417.51 is: 625.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.32 : 1,367.19 = 417.51 : x
  2. Step 2: Convert to fraction form
    912.32/1,367.19 = 417.51/x
  3. Step 3: Cross multiply
    912.32x = 1,367.19 × 417.51
  4. Step 4: Simplify right side
    912.32x = 570,812.08
  5. Step 5: Solve for x
    x = 570,812.08/912.32
  6. Step 6: Final answer
    x = 625.67

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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.