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Finding the Fourth Proportional to 3,128.99, 4,693.05 and 1,049.00

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Solution

The fourth proportional to 3,128.99, 4,693.05 and 1,049.00 is: 1,573.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.99 : 4,693.05 = 1,049.00 : x
  2. Step 2: Convert to fraction form
    3,128.99/4,693.05 = 1,049.00/x
  3. Step 3: Cross multiply
    3,128.99x = 4,693.05 × 1,049.00
  4. Step 4: Simplify right side
    3,128.99x = 4,922,985.98
  5. Step 5: Solve for x
    x = 4,922,985.98/3,128.99
  6. Step 6: Final answer
    x = 1,573.35

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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.