Home / 1,038.20-1,555.70-900.60

Finding the Fourth Proportional to 1,038.20, 1,555.70 and 900.60

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Solution

The fourth proportional to 1,038.20, 1,555.70 and 900.60 is: 1,349.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.20 : 1,555.70 = 900.60 : x
  2. Step 2: Convert to fraction form
    1,038.20/1,555.70 = 900.60/x
  3. Step 3: Cross multiply
    1,038.20x = 1,555.70 × 900.60
  4. Step 4: Simplify right side
    1,038.20x = 1,401,063.42
  5. Step 5: Solve for x
    x = 1,401,063.42/1,038.20
  6. Step 6: Final answer
    x = 1,349.51

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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.