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Finding the Fourth Proportional to 604.98, 907.28 and 312.45

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Solution

The fourth proportional to 604.98, 907.28 and 312.45 is: 468.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.98 : 907.28 = 312.45 : x
  2. Step 2: Convert to fraction form
    604.98/907.28 = 312.45/x
  3. Step 3: Cross multiply
    604.98x = 907.28 × 312.45
  4. Step 4: Simplify right side
    604.98x = 283,479.64
  5. Step 5: Solve for x
    x = 283,479.64/604.98
  6. Step 6: Final answer
    x = 468.58

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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.