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Finding the Fourth Proportional to 875.83, 1,208.67 and 482.86

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Solution

The fourth proportional to 875.83, 1,208.67 and 482.86 is: 666.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.83 : 1,208.67 = 482.86 : x
  2. Step 2: Convert to fraction form
    875.83/1,208.67 = 482.86/x
  3. Step 3: Cross multiply
    875.83x = 1,208.67 × 482.86
  4. Step 4: Simplify right side
    875.83x = 583,618.40
  5. Step 5: Solve for x
    x = 583,618.40/875.83
  6. Step 6: Final answer
    x = 666.36

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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.