Home / 1,985.68-2,977.50-668.98

Finding the Fourth Proportional to 1,985.68, 2,977.50 and 668.98

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Solution

The fourth proportional to 1,985.68, 2,977.50 and 668.98 is: 1,003.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.68 : 2,977.50 = 668.98 : x
  2. Step 2: Convert to fraction form
    1,985.68/2,977.50 = 668.98/x
  3. Step 3: Cross multiply
    1,985.68x = 2,977.50 × 668.98
  4. Step 4: Simplify right side
    1,985.68x = 1,991,887.95
  5. Step 5: Solve for x
    x = 1,991,887.95/1,985.68
  6. Step 6: Final answer
    x = 1,003.13

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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.