Home / 1,021.60-1,528.80-935.20

Finding the Fourth Proportional to 1,021.60, 1,528.80 and 935.20

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Solution

The fourth proportional to 1,021.60, 1,528.80 and 935.20 is: 1,399.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.60 : 1,528.80 = 935.20 : x
  2. Step 2: Convert to fraction form
    1,021.60/1,528.80 = 935.20/x
  3. Step 3: Cross multiply
    1,021.60x = 1,528.80 × 935.20
  4. Step 4: Simplify right side
    1,021.60x = 1,429,733.76
  5. Step 5: Solve for x
    x = 1,429,733.76/1,021.60
  6. Step 6: Final answer
    x = 1,399.50

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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.