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Finding the Fourth Proportional to 992.91, 1,487.47 and 603.03

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Solution

The fourth proportional to 992.91, 1,487.47 and 603.03 is: 903.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    992.91 : 1,487.47 = 603.03 : x
  2. Step 2: Convert to fraction form
    992.91/1,487.47 = 603.03/x
  3. Step 3: Cross multiply
    992.91x = 1,487.47 × 603.03
  4. Step 4: Simplify right side
    992.91x = 896,989.03
  5. Step 5: Solve for x
    x = 896,989.03/992.91
  6. Step 6: Final answer
    x = 903.39

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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.