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Finding the Fourth Proportional to 988.94, 1,483.37 and 469.19

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Solution

The fourth proportional to 988.94, 1,483.37 and 469.19 is: 703.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.94 : 1,483.37 = 469.19 : x
  2. Step 2: Convert to fraction form
    988.94/1,483.37 = 469.19/x
  3. Step 3: Cross multiply
    988.94x = 1,483.37 × 469.19
  4. Step 4: Simplify right side
    988.94x = 695,972.61
  5. Step 5: Solve for x
    x = 695,972.61/988.94
  6. Step 6: Final answer
    x = 703.76

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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.