Home / 1,529.40-2,109.96-998.10

Finding the Fourth Proportional to 1,529.40, 2,109.96 and 998.10

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Solution

The fourth proportional to 1,529.40, 2,109.96 and 998.10 is: 1,376.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,529.40 : 2,109.96 = 998.10 : x
  2. Step 2: Convert to fraction form
    1,529.40/2,109.96 = 998.10/x
  3. Step 3: Cross multiply
    1,529.40x = 2,109.96 × 998.10
  4. Step 4: Simplify right side
    1,529.40x = 2,105,955.16
  5. Step 5: Solve for x
    x = 2,105,955.16/1,529.40
  6. Step 6: Final answer
    x = 1,376.98

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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.