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Finding the Fourth Proportional to 897.96, 1,345.82 and 320.20

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Solution

The fourth proportional to 897.96, 1,345.82 and 320.20 is: 479.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.96 : 1,345.82 = 320.20 : x
  2. Step 2: Convert to fraction form
    897.96/1,345.82 = 320.20/x
  3. Step 3: Cross multiply
    897.96x = 1,345.82 × 320.20
  4. Step 4: Simplify right side
    897.96x = 430,931.56
  5. Step 5: Solve for x
    x = 430,931.56/897.96
  6. Step 6: Final answer
    x = 479.90

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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.