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Finding the Fourth Proportional to 604.40, 907.70 and 528.80

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Solution

The fourth proportional to 604.40, 907.70 and 528.80 is: 794.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.40 : 907.70 = 528.80 : x
  2. Step 2: Convert to fraction form
    604.40/907.70 = 528.80/x
  3. Step 3: Cross multiply
    604.40x = 907.70 × 528.80
  4. Step 4: Simplify right side
    604.40x = 479,991.76
  5. Step 5: Solve for x
    x = 479,991.76/604.40
  6. Step 6: Final answer
    x = 794.16

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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.