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Finding the Fourth Proportional to 992.48, 1,485.76 and 558.32

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Solution

The fourth proportional to 992.48, 1,485.76 and 558.32 is: 835.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.48 : 1,485.76 = 558.32 : x
  2. Step 2: Convert to fraction form
    992.48/1,485.76 = 558.32/x
  3. Step 3: Cross multiply
    992.48x = 1,485.76 × 558.32
  4. Step 4: Simplify right side
    992.48x = 829,529.52
  5. Step 5: Solve for x
    x = 829,529.52/992.48
  6. Step 6: Final answer
    x = 835.81

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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.