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Finding the Fourth Proportional to 1,505.87, 2,258.23 and 518.40

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Solution

The fourth proportional to 1,505.87, 2,258.23 and 518.40 is: 777.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,505.87 : 2,258.23 = 518.40 : x
  2. Step 2: Convert to fraction form
    1,505.87/2,258.23 = 518.40/x
  3. Step 3: Cross multiply
    1,505.87x = 2,258.23 × 518.40
  4. Step 4: Simplify right side
    1,505.87x = 1,170,666.43
  5. Step 5: Solve for x
    x = 1,170,666.43/1,505.87
  6. Step 6: Final answer
    x = 777.40

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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.