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Finding the Fourth Proportional to 897.80, 1,345.91 and 349.86

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Solution

The fourth proportional to 897.80, 1,345.91 and 349.86 is: 524.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.80 : 1,345.91 = 349.86 : x
  2. Step 2: Convert to fraction form
    897.80/1,345.91 = 349.86/x
  3. Step 3: Cross multiply
    897.80x = 1,345.91 × 349.86
  4. Step 4: Simplify right side
    897.80x = 470,878.47
  5. Step 5: Solve for x
    x = 470,878.47/897.80
  6. Step 6: Final answer
    x = 524.48

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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.