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Finding the Fourth Proportional to 897.15, 1,345.44 and 349.20

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Solution

The fourth proportional to 897.15, 1,345.44 and 349.20 is: 523.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.15 : 1,345.44 = 349.20 : x
  2. Step 2: Convert to fraction form
    897.15/1,345.44 = 349.20/x
  3. Step 3: Cross multiply
    897.15x = 1,345.44 × 349.20
  4. Step 4: Simplify right side
    897.15x = 469,827.65
  5. Step 5: Solve for x
    x = 469,827.65/897.15
  6. Step 6: Final answer
    x = 523.69

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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.