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Finding the Fourth Proportional to 605, 907.64 and 312.38

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Solution

The fourth proportional to 605, 907.64 and 312.38 is: 468.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    605 : 907.64 = 312.38 : x
  2. Step 2: Convert to fraction form
    605/907.64 = 312.38/x
  3. Step 3: Cross multiply
    605x = 907.64 × 312.38
  4. Step 4: Simplify right side
    605x = 283,528.58
  5. Step 5: Solve for x
    x = 283,528.58/605
  6. Step 6: Final answer
    x = 468.64

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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.