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Finding the Fourth Proportional to 988.44, 1,485.35 and 526.55

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Solution

The fourth proportional to 988.44, 1,485.35 and 526.55 is: 791.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.44 : 1,485.35 = 526.55 : x
  2. Step 2: Convert to fraction form
    988.44/1,485.35 = 526.55/x
  3. Step 3: Cross multiply
    988.44x = 1,485.35 × 526.55
  4. Step 4: Simplify right side
    988.44x = 782,102.96
  5. Step 5: Solve for x
    x = 782,102.96/988.44
  6. Step 6: Final answer
    x = 791.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.