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Finding the Fourth Proportional to 604.78, 907.13 and 214.76

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Solution

The fourth proportional to 604.78, 907.13 and 214.76 is: 322.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.78 : 907.13 = 214.76 : x
  2. Step 2: Convert to fraction form
    604.78/907.13 = 214.76/x
  3. Step 3: Cross multiply
    604.78x = 907.13 × 214.76
  4. Step 4: Simplify right side
    604.78x = 194,818.04
  5. Step 5: Solve for x
    x = 194,818.04/604.78
  6. Step 6: Final answer
    x = 322.13

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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.