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Finding the Fourth Proportional to 663.19, 914.40 and 573.30

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Solution

The fourth proportional to 663.19, 914.40 and 573.30 is: 790.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.19 : 914.40 = 573.30 : x
  2. Step 2: Convert to fraction form
    663.19/914.40 = 573.30/x
  3. Step 3: Cross multiply
    663.19x = 914.40 × 573.30
  4. Step 4: Simplify right side
    663.19x = 524,222.65
  5. Step 5: Solve for x
    x = 524,222.65/663.19
  6. Step 6: Final answer
    x = 790.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.