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Finding the Fourth Proportional to 912.35, 1,368.55 and 357.04

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Solution

The fourth proportional to 912.35, 1,368.55 and 357.04 is: 535.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.35 : 1,368.55 = 357.04 : x
  2. Step 2: Convert to fraction form
    912.35/1,368.55 = 357.04/x
  3. Step 3: Cross multiply
    912.35x = 1,368.55 × 357.04
  4. Step 4: Simplify right side
    912.35x = 488,620.25
  5. Step 5: Solve for x
    x = 488,620.25/912.35
  6. Step 6: Final answer
    x = 535.57

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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.