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Finding the Fourth Proportional to 749.36, 1,124.10 and 255.75

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Solution

The fourth proportional to 749.36, 1,124.10 and 255.75 is: 383.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.36 : 1,124.10 = 255.75 : x
  2. Step 2: Convert to fraction form
    749.36/1,124.10 = 255.75/x
  3. Step 3: Cross multiply
    749.36x = 1,124.10 × 255.75
  4. Step 4: Simplify right side
    749.36x = 287,488.58
  5. Step 5: Solve for x
    x = 287,488.58/749.36
  6. Step 6: Final answer
    x = 383.65

Related Problems

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Half scale
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Double scale
Find fourth proportional to 750.36, 1,125.60 and 256.75
Similar ratio
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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.