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Finding the Fourth Proportional to 4,989.74, 7,485.50 and 1,658.19

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Solution

The fourth proportional to 4,989.74, 7,485.50 and 1,658.19 is: 2,487.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,989.74 : 7,485.50 = 1,658.19 : x
  2. Step 2: Convert to fraction form
    4,989.74/7,485.50 = 1,658.19/x
  3. Step 3: Cross multiply
    4,989.74x = 7,485.50 × 1,658.19
  4. Step 4: Simplify right side
    4,989.74x = 12,412,372.95
  5. Step 5: Solve for x
    x = 12,412,372.95/4,989.74
  6. Step 6: Final answer
    x = 2,487.58

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Double scale
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1.5x scale

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.