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Finding the Fourth Proportional to 886,990.40, 1,330,485.60 and 354,893.30

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Solution

The fourth proportional to 886,990.40, 1,330,485.60 and 354,893.30 is: 532,339.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,990.40 : 1,330,485.60 = 354,893.30 : x
  2. Step 2: Convert to fraction form
    886,990.40/1,330,485.60 = 354,893.30/x
  3. Step 3: Cross multiply
    886,990.40x = 1,330,485.60 × 354,893.30
  4. Step 4: Simplify right side
    886,990.40x = 472,180,425,186.48
  5. Step 5: Solve for x
    x = 472,180,425,186.48/886,990.40
  6. Step 6: Final answer
    x = 532,339.95

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Double scale
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Similar ratio
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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.