Home / 1,985.20-2,739.60-1,088.98

Finding the Fourth Proportional to 1,985.20, 2,739.60 and 1,088.98

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Solution

The fourth proportional to 1,985.20, 2,739.60 and 1,088.98 is: 1,502.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.20 : 2,739.60 = 1,088.98 : x
  2. Step 2: Convert to fraction form
    1,985.20/2,739.60 = 1,088.98/x
  3. Step 3: Cross multiply
    1,985.20x = 2,739.60 × 1,088.98
  4. Step 4: Simplify right side
    1,985.20x = 2,983,362.76
  5. Step 5: Solve for x
    x = 2,983,362.76/1,985.20
  6. Step 6: Final answer
    x = 1,502.80

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