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Finding the Fourth Proportional to 873.08, 1,303.48 and 666.56

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Solution

The fourth proportional to 873.08, 1,303.48 and 666.56 is: 995.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.08 : 1,303.48 = 666.56 : x
  2. Step 2: Convert to fraction form
    873.08/1,303.48 = 666.56/x
  3. Step 3: Cross multiply
    873.08x = 1,303.48 × 666.56
  4. Step 4: Simplify right side
    873.08x = 868,847.63
  5. Step 5: Solve for x
    x = 868,847.63/873.08
  6. Step 6: Final answer
    x = 995.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.