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Finding the Fourth Proportional to 957.81, 1,434.83 and 751.35

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Solution

The fourth proportional to 957.81, 1,434.83 and 751.35 is: 1,125.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.81 : 1,434.83 = 751.35 : x
  2. Step 2: Convert to fraction form
    957.81/1,434.83 = 751.35/x
  3. Step 3: Cross multiply
    957.81x = 1,434.83 × 751.35
  4. Step 4: Simplify right side
    957.81x = 1,078,055.76
  5. Step 5: Solve for x
    x = 1,078,055.76/957.81
  6. Step 6: Final answer
    x = 1,125.54

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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.