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Finding the Fourth Proportional to 897.55, 1,346.42 and 312.48

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Solution

The fourth proportional to 897.55, 1,346.42 and 312.48 is: 468.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.55 : 1,346.42 = 312.48 : x
  2. Step 2: Convert to fraction form
    897.55/1,346.42 = 312.48/x
  3. Step 3: Cross multiply
    897.55x = 1,346.42 × 312.48
  4. Step 4: Simplify right side
    897.55x = 420,729.32
  5. Step 5: Solve for x
    x = 420,729.32/897.55
  6. Step 6: Final answer
    x = 468.75

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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.