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Finding the Fourth Proportional to 875.40, 1,313.30 and 550.99

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Solution

The fourth proportional to 875.40, 1,313.30 and 550.99 is: 826.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.40 : 1,313.30 = 550.99 : x
  2. Step 2: Convert to fraction form
    875.40/1,313.30 = 550.99/x
  3. Step 3: Cross multiply
    875.40x = 1,313.30 × 550.99
  4. Step 4: Simplify right side
    875.40x = 723,615.17
  5. Step 5: Solve for x
    x = 723,615.17/875.40
  6. Step 6: Final answer
    x = 826.61

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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.