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Finding the Fourth Proportional to 875.75, 1,208.45 and 502.76

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Solution

The fourth proportional to 875.75, 1,208.45 and 502.76 is: 693.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.75 : 1,208.45 = 502.76 : x
  2. Step 2: Convert to fraction form
    875.75/1,208.45 = 502.76/x
  3. Step 3: Cross multiply
    875.75x = 1,208.45 × 502.76
  4. Step 4: Simplify right side
    875.75x = 607,551.77
  5. Step 5: Solve for x
    x = 607,551.77/875.75
  6. Step 6: Final answer
    x = 693.75

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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.