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Finding the Fourth Proportional to 899.91, 1,349.46 and 380.30

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Solution

The fourth proportional to 899.91, 1,349.46 and 380.30 is: 570.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.91 : 1,349.46 = 380.30 : x
  2. Step 2: Convert to fraction form
    899.91/1,349.46 = 380.30/x
  3. Step 3: Cross multiply
    899.91x = 1,349.46 × 380.30
  4. Step 4: Simplify right side
    899.91x = 513,192.89
  5. Step 5: Solve for x
    x = 513,192.89/899.91
  6. Step 6: Final answer
    x = 570.27

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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.