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Finding the Fourth Proportional to 897.07, 1,345.38 and 319.95

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Solution

The fourth proportional to 897.07, 1,345.38 and 319.95 is: 479.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.07 : 1,345.38 = 319.95 : x
  2. Step 2: Convert to fraction form
    897.07/1,345.38 = 319.95/x
  3. Step 3: Cross multiply
    897.07x = 1,345.38 × 319.95
  4. Step 4: Simplify right side
    897.07x = 430,454.33
  5. Step 5: Solve for x
    x = 430,454.33/897.07
  6. Step 6: Final answer
    x = 479.84

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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.