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Finding the Fourth Proportional to 1,157.40, 1,733.40 and 1,130.40

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Solution

The fourth proportional to 1,157.40, 1,733.40 and 1,130.40 is: 1,692.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.40 : 1,733.40 = 1,130.40 : x
  2. Step 2: Convert to fraction form
    1,157.40/1,733.40 = 1,130.40/x
  3. Step 3: Cross multiply
    1,157.40x = 1,733.40 × 1,130.40
  4. Step 4: Simplify right side
    1,157.40x = 1,959,435.36
  5. Step 5: Solve for x
    x = 1,959,435.36/1,157.40
  6. Step 6: Final answer
    x = 1,692.96

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1.5x scale

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.