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Finding the Fourth Proportional to 1,124.84, 1,551.40 and 998.93

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Solution

The fourth proportional to 1,124.84, 1,551.40 and 998.93 is: 1,377.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.84 : 1,551.40 = 998.93 : x
  2. Step 2: Convert to fraction form
    1,124.84/1,551.40 = 998.93/x
  3. Step 3: Cross multiply
    1,124.84x = 1,551.40 × 998.93
  4. Step 4: Simplify right side
    1,124.84x = 1,549,740.00
  5. Step 5: Solve for x
    x = 1,549,740.00/1,124.84
  6. Step 6: Final answer
    x = 1,377.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.