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Finding the Fourth Proportional to 690.02, 1,033.22 and 580.08

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Solution

The fourth proportional to 690.02, 1,033.22 and 580.08 is: 868.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.02 : 1,033.22 = 580.08 : x
  2. Step 2: Convert to fraction form
    690.02/1,033.22 = 580.08/x
  3. Step 3: Cross multiply
    690.02x = 1,033.22 × 580.08
  4. Step 4: Simplify right side
    690.02x = 599,349.77
  5. Step 5: Solve for x
    x = 599,349.77/690.02
  6. Step 6: Final answer
    x = 868.60

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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.