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Finding the Fourth Proportional to 875.60, 1,312.02 and 550.28

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Solution

The fourth proportional to 875.60, 1,312.02 and 550.28 is: 824.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.60 : 1,312.02 = 550.28 : x
  2. Step 2: Convert to fraction form
    875.60/1,312.02 = 550.28/x
  3. Step 3: Cross multiply
    875.60x = 1,312.02 × 550.28
  4. Step 4: Simplify right side
    875.60x = 721,982.22
  5. Step 5: Solve for x
    x = 721,982.22/875.60
  6. Step 6: Final answer
    x = 824.56

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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.