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Finding the Fourth Proportional to 894.21, 1,341.04 and 431.70

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Solution

The fourth proportional to 894.21, 1,341.04 and 431.70 is: 647.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.21 : 1,341.04 = 431.70 : x
  2. Step 2: Convert to fraction form
    894.21/1,341.04 = 431.70/x
  3. Step 3: Cross multiply
    894.21x = 1,341.04 × 431.70
  4. Step 4: Simplify right side
    894.21x = 578,926.97
  5. Step 5: Solve for x
    x = 578,926.97/894.21
  6. Step 6: Final answer
    x = 647.42

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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.