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Finding the Fourth Proportional to 1,190.84, 1,785.18 and 612.50

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Solution

The fourth proportional to 1,190.84, 1,785.18 and 612.50 is: 918.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.84 : 1,785.18 = 612.50 : x
  2. Step 2: Convert to fraction form
    1,190.84/1,785.18 = 612.50/x
  3. Step 3: Cross multiply
    1,190.84x = 1,785.18 × 612.50
  4. Step 4: Simplify right side
    1,190.84x = 1,093,422.75
  5. Step 5: Solve for x
    x = 1,093,422.75/1,190.84
  6. Step 6: Final answer
    x = 918.19

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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.