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Finding the Fourth Proportional to 957.85, 1,435.43 and 518.15

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Solution

The fourth proportional to 957.85, 1,435.43 and 518.15 is: 776.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.85 : 1,435.43 = 518.15 : x
  2. Step 2: Convert to fraction form
    957.85/1,435.43 = 518.15/x
  3. Step 3: Cross multiply
    957.85x = 1,435.43 × 518.15
  4. Step 4: Simplify right side
    957.85x = 743,772.94
  5. Step 5: Solve for x
    x = 743,772.94/957.85
  6. Step 6: Final answer
    x = 776.50

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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.