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Finding the Fourth Proportional to 848.32, 1,172.32 and 690.64

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Solution

The fourth proportional to 848.32, 1,172.32 and 690.64 is: 954.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.32 : 1,172.32 = 690.64 : x
  2. Step 2: Convert to fraction form
    848.32/1,172.32 = 690.64/x
  3. Step 3: Cross multiply
    848.32x = 1,172.32 × 690.64
  4. Step 4: Simplify right side
    848.32x = 809,651.08
  5. Step 5: Solve for x
    x = 809,651.08/848.32
  6. Step 6: Final answer
    x = 954.42

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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.