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Finding the Fourth Proportional to 876.06, 1,208.86 and 503.06

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Solution

The fourth proportional to 876.06, 1,208.86 and 503.06 is: 694.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.06 : 1,208.86 = 503.06 : x
  2. Step 2: Convert to fraction form
    876.06/1,208.86 = 503.06/x
  3. Step 3: Cross multiply
    876.06x = 1,208.86 × 503.06
  4. Step 4: Simplify right side
    876.06x = 608,129.11
  5. Step 5: Solve for x
    x = 608,129.11/876.06
  6. Step 6: Final answer
    x = 694.16

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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.