Home / 1,220.18-1,830.15-987.93

Finding the Fourth Proportional to 1,220.18, 1,830.15 and 987.93

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Solution

The fourth proportional to 1,220.18, 1,830.15 and 987.93 is: 1,481.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.18 : 1,830.15 = 987.93 : x
  2. Step 2: Convert to fraction form
    1,220.18/1,830.15 = 987.93/x
  3. Step 3: Cross multiply
    1,220.18x = 1,830.15 × 987.93
  4. Step 4: Simplify right side
    1,220.18x = 1,808,060.09
  5. Step 5: Solve for x
    x = 1,808,060.09/1,220.18
  6. Step 6: Final answer
    x = 1,481.80

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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.