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Finding the Fourth Proportional to 975.72, 1,345.83 and 582.60

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Solution

The fourth proportional to 975.72, 1,345.83 and 582.60 is: 803.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.72 : 1,345.83 = 582.60 : x
  2. Step 2: Convert to fraction form
    975.72/1,345.83 = 582.60/x
  3. Step 3: Cross multiply
    975.72x = 1,345.83 × 582.60
  4. Step 4: Simplify right side
    975.72x = 784,080.56
  5. Step 5: Solve for x
    x = 784,080.56/975.72
  6. Step 6: Final answer
    x = 803.59

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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.