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Finding the Fourth Proportional to 782.54, 1,173.53 and 320.07

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Solution

The fourth proportional to 782.54, 1,173.53 and 320.07 is: 479.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.54 : 1,173.53 = 320.07 : x
  2. Step 2: Convert to fraction form
    782.54/1,173.53 = 320.07/x
  3. Step 3: Cross multiply
    782.54x = 1,173.53 × 320.07
  4. Step 4: Simplify right side
    782.54x = 375,611.75
  5. Step 5: Solve for x
    x = 375,611.75/782.54
  6. Step 6: Final answer
    x = 479.99

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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.