Home / 1,551.34-2,139.21-1,109.08

Finding the Fourth Proportional to 1,551.34, 2,139.21 and 1,109.08

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Solution

The fourth proportional to 1,551.34, 2,139.21 and 1,109.08 is: 1,529.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.34 : 2,139.21 = 1,109.08 : x
  2. Step 2: Convert to fraction form
    1,551.34/2,139.21 = 1,109.08/x
  3. Step 3: Cross multiply
    1,551.34x = 2,139.21 × 1,109.08
  4. Step 4: Simplify right side
    1,551.34x = 2,372,555.03
  5. Step 5: Solve for x
    x = 2,372,555.03/1,551.34
  6. Step 6: Final answer
    x = 1,529.36

Related Problems

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Half scale
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Double scale
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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.