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Finding the Fourth Proportional to 852.47, 1,275.75 and 621.02

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Solution

The fourth proportional to 852.47, 1,275.75 and 621.02 is: 929.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.47 : 1,275.75 = 621.02 : x
  2. Step 2: Convert to fraction form
    852.47/1,275.75 = 621.02/x
  3. Step 3: Cross multiply
    852.47x = 1,275.75 × 621.02
  4. Step 4: Simplify right side
    852.47x = 792,262.28
  5. Step 5: Solve for x
    x = 792,262.28/852.47
  6. Step 6: Final answer
    x = 929.37

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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.