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Finding the Fourth Proportional to 749.89, 1,124.69 and 256.26

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Solution

The fourth proportional to 749.89, 1,124.69 and 256.26 is: 384.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.89 : 1,124.69 = 256.26 : x
  2. Step 2: Convert to fraction form
    749.89/1,124.69 = 256.26/x
  3. Step 3: Cross multiply
    749.89x = 1,124.69 × 256.26
  4. Step 4: Simplify right side
    749.89x = 288,211.78
  5. Step 5: Solve for x
    x = 288,211.78/749.89
  6. Step 6: Final answer
    x = 384.34

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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.