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Finding the Fourth Proportional to 1,070.96, 1,606.40 and 757.32

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Solution

The fourth proportional to 1,070.96, 1,606.40 and 757.32 is: 1,135.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.96 : 1,606.40 = 757.32 : x
  2. Step 2: Convert to fraction form
    1,070.96/1,606.40 = 757.32/x
  3. Step 3: Cross multiply
    1,070.96x = 1,606.40 × 757.32
  4. Step 4: Simplify right side
    1,070.96x = 1,216,558.85
  5. Step 5: Solve for x
    x = 1,216,558.85/1,070.96
  6. Step 6: Final answer
    x = 1,135.95

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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.