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Finding the Fourth Proportional to 875.37, 1,313.10 and 442.38

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Solution

The fourth proportional to 875.37, 1,313.10 and 442.38 is: 663.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.37 : 1,313.10 = 442.38 : x
  2. Step 2: Convert to fraction form
    875.37/1,313.10 = 442.38/x
  3. Step 3: Cross multiply
    875.37x = 1,313.10 × 442.38
  4. Step 4: Simplify right side
    875.37x = 580,889.18
  5. Step 5: Solve for x
    x = 580,889.18/875.37
  6. Step 6: Final answer
    x = 663.59

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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.