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Finding the Fourth Proportional to 1,479.54, 2,220.60 and 993.18

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Solution

The fourth proportional to 1,479.54, 2,220.60 and 993.18 is: 1,490.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.54 : 2,220.60 = 993.18 : x
  2. Step 2: Convert to fraction form
    1,479.54/2,220.60 = 993.18/x
  3. Step 3: Cross multiply
    1,479.54x = 2,220.60 × 993.18
  4. Step 4: Simplify right side
    1,479.54x = 2,205,455.51
  5. Step 5: Solve for x
    x = 2,205,455.51/1,479.54
  6. Step 6: Final answer
    x = 1,490.64

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1.5x scale

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.