Home / 1,308.20-1,962.60-383.72

Finding the Fourth Proportional to 1,308.20, 1,962.60 and 383.72

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Solution

The fourth proportional to 1,308.20, 1,962.60 and 383.72 is: 575.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.20 : 1,962.60 = 383.72 : x
  2. Step 2: Convert to fraction form
    1,308.20/1,962.60 = 383.72/x
  3. Step 3: Cross multiply
    1,308.20x = 1,962.60 × 383.72
  4. Step 4: Simplify right side
    1,308.20x = 753,088.87
  5. Step 5: Solve for x
    x = 753,088.87/1,308.20
  6. Step 6: Final answer
    x = 575.67

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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.