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Finding the Fourth Proportional to 875.18, 1,206.09 and 626.07

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Solution

The fourth proportional to 875.18, 1,206.09 and 626.07 is: 862.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.18 : 1,206.09 = 626.07 : x
  2. Step 2: Convert to fraction form
    875.18/1,206.09 = 626.07/x
  3. Step 3: Cross multiply
    875.18x = 1,206.09 × 626.07
  4. Step 4: Simplify right side
    875.18x = 755,097.90
  5. Step 5: Solve for x
    x = 755,097.90/875.18
  6. Step 6: Final answer
    x = 862.79

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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.