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Finding the Fourth Proportional to 897.85, 1,346.37 and 320.74

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Solution

The fourth proportional to 897.85, 1,346.37 and 320.74 is: 480.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.85 : 1,346.37 = 320.74 : x
  2. Step 2: Convert to fraction form
    897.85/1,346.37 = 320.74/x
  3. Step 3: Cross multiply
    897.85x = 1,346.37 × 320.74
  4. Step 4: Simplify right side
    897.85x = 431,834.71
  5. Step 5: Solve for x
    x = 431,834.71/897.85
  6. Step 6: Final answer
    x = 480.97

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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.