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Finding the Fourth Proportional to 875.67, 1,208.47 and 502.74

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Solution

The fourth proportional to 875.67, 1,208.47 and 502.74 is: 693.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.67 : 1,208.47 = 502.74 : x
  2. Step 2: Convert to fraction form
    875.67/1,208.47 = 502.74/x
  3. Step 3: Cross multiply
    875.67x = 1,208.47 × 502.74
  4. Step 4: Simplify right side
    875.67x = 607,540.17
  5. Step 5: Solve for x
    x = 607,540.17/875.67
  6. Step 6: Final answer
    x = 693.80

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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.