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Finding the Fourth Proportional to 657.20, 913.04 and 651.20

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Solution

The fourth proportional to 657.20, 913.04 and 651.20 is: 904.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.20 : 913.04 = 651.20 : x
  2. Step 2: Convert to fraction form
    657.20/913.04 = 651.20/x
  3. Step 3: Cross multiply
    657.20x = 913.04 × 651.20
  4. Step 4: Simplify right side
    657.20x = 594,571.65
  5. Step 5: Solve for x
    x = 594,571.65/657.20
  6. Step 6: Final answer
    x = 904.70

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.