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Finding the Fourth Proportional to 749.04, 1,123.61 and 228.99

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Solution

The fourth proportional to 749.04, 1,123.61 and 228.99 is: 343.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.04 : 1,123.61 = 228.99 : x
  2. Step 2: Convert to fraction form
    749.04/1,123.61 = 228.99/x
  3. Step 3: Cross multiply
    749.04x = 1,123.61 × 228.99
  4. Step 4: Simplify right side
    749.04x = 257,294.31
  5. Step 5: Solve for x
    x = 257,294.31/749.04
  6. Step 6: Final answer
    x = 343.50

Related Problems

Find fourth proportional to 374.52, 561.80 and 114.50
Half scale
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Double scale
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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.