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Finding the Fourth Proportional to 749.02, 1,122.69 and 383.28

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Solution

The fourth proportional to 749.02, 1,122.69 and 383.28 is: 574.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.02 : 1,122.69 = 383.28 : x
  2. Step 2: Convert to fraction form
    749.02/1,122.69 = 383.28/x
  3. Step 3: Cross multiply
    749.02x = 1,122.69 × 383.28
  4. Step 4: Simplify right side
    749.02x = 430,304.62
  5. Step 5: Solve for x
    x = 430,304.62/749.02
  6. Step 6: Final answer
    x = 574.49

Related Problems

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Half scale
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Double scale
Find fourth proportional to 750.02, 1,124.19 and 384.28
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.