Home / 1,690.02-2,328.48-1,191.87

Finding the Fourth Proportional to 1,690.02, 2,328.48 and 1,191.87

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Solution

The fourth proportional to 1,690.02, 2,328.48 and 1,191.87 is: 1,642.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.02 : 2,328.48 = 1,191.87 : x
  2. Step 2: Convert to fraction form
    1,690.02/2,328.48 = 1,191.87/x
  3. Step 3: Cross multiply
    1,690.02x = 2,328.48 × 1,191.87
  4. Step 4: Simplify right side
    1,690.02x = 2,775,245.46
  5. Step 5: Solve for x
    x = 2,775,245.46/1,690.02
  6. Step 6: Final answer
    x = 1,642.14

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Why These Related Problems?

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