Home / 1,588.04-2,190.37-990.84

Finding the Fourth Proportional to 1,588.04, 2,190.37 and 990.84

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Solution

The fourth proportional to 1,588.04, 2,190.37 and 990.84 is: 1,366.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,588.04 : 2,190.37 = 990.84 : x
  2. Step 2: Convert to fraction form
    1,588.04/2,190.37 = 990.84/x
  3. Step 3: Cross multiply
    1,588.04x = 2,190.37 × 990.84
  4. Step 4: Simplify right side
    1,588.04x = 2,170,296.50
  5. Step 5: Solve for x
    x = 2,170,296.50/1,588.04
  6. Step 6: Final answer
    x = 1,366.65

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1.5x scale

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.