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Finding the Fourth Proportional to 941.57, 1,412.69 and 421.53

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Solution

The fourth proportional to 941.57, 1,412.69 and 421.53 is: 632.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.57 : 1,412.69 = 421.53 : x
  2. Step 2: Convert to fraction form
    941.57/1,412.69 = 421.53/x
  3. Step 3: Cross multiply
    941.57x = 1,412.69 × 421.53
  4. Step 4: Simplify right side
    941.57x = 595,482.04
  5. Step 5: Solve for x
    x = 595,482.04/941.57
  6. Step 6: Final answer
    x = 632.44

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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.