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Finding the Fourth Proportional to 1,573.58, 2,172.48 and 984.92

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Solution

The fourth proportional to 1,573.58, 2,172.48 and 984.92 is: 1,359.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,573.58 : 2,172.48 = 984.92 : x
  2. Step 2: Convert to fraction form
    1,573.58/2,172.48 = 984.92/x
  3. Step 3: Cross multiply
    1,573.58x = 2,172.48 × 984.92
  4. Step 4: Simplify right side
    1,573.58x = 2,139,719.00
  5. Step 5: Solve for x
    x = 2,139,719.00/1,573.58
  6. Step 6: Final answer
    x = 1,359.78

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1.5x scale

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.