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Finding the Fourth Proportional to 1,513.67, 2,270.30 and 782.87

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Solution

The fourth proportional to 1,513.67, 2,270.30 and 782.87 is: 1,174.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,513.67 : 2,270.30 = 782.87 : x
  2. Step 2: Convert to fraction form
    1,513.67/2,270.30 = 782.87/x
  3. Step 3: Cross multiply
    1,513.67x = 2,270.30 × 782.87
  4. Step 4: Simplify right side
    1,513.67x = 1,777,334.50
  5. Step 5: Solve for x
    x = 1,777,334.50/1,513.67
  6. Step 6: Final answer
    x = 1,174.19

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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.