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Finding the Fourth Proportional to 1,152.03, 1,728.05 and 286.34

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Solution

The fourth proportional to 1,152.03, 1,728.05 and 286.34 is: 429.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152.03 : 1,728.05 = 286.34 : x
  2. Step 2: Convert to fraction form
    1,152.03/1,728.05 = 286.34/x
  3. Step 3: Cross multiply
    1,152.03x = 1,728.05 × 286.34
  4. Step 4: Simplify right side
    1,152.03x = 494,812.73
  5. Step 5: Solve for x
    x = 494,812.73/1,152.03
  6. Step 6: Final answer
    x = 429.51

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Double scale
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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.