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Finding the Fourth Proportional to 1,121.92, 1,681.02 and 573.35

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Solution

The fourth proportional to 1,121.92, 1,681.02 and 573.35 is: 859.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.92 : 1,681.02 = 573.35 : x
  2. Step 2: Convert to fraction form
    1,121.92/1,681.02 = 573.35/x
  3. Step 3: Cross multiply
    1,121.92x = 1,681.02 × 573.35
  4. Step 4: Simplify right side
    1,121.92x = 963,804.41
  5. Step 5: Solve for x
    x = 963,804.41/1,121.92
  6. Step 6: Final answer
    x = 859.07

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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.