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Finding the Fourth Proportional to 957.51, 1,321.37 and 559.19

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Solution

The fourth proportional to 957.51, 1,321.37 and 559.19 is: 771.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.51 : 1,321.37 = 559.19 : x
  2. Step 2: Convert to fraction form
    957.51/1,321.37 = 559.19/x
  3. Step 3: Cross multiply
    957.51x = 1,321.37 × 559.19
  4. Step 4: Simplify right side
    957.51x = 738,894.54
  5. Step 5: Solve for x
    x = 738,894.54/957.51
  6. Step 6: Final answer
    x = 771.69

Related Problems

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.