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Finding the Fourth Proportional to 2,985,789.63, 4,478,684.46 and 991,245.63

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Solution

The fourth proportional to 2,985,789.63, 4,478,684.46 and 991,245.63 is: 1,486,868.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985,789.63 : 4,478,684.46 = 991,245.63 : x
  2. Step 2: Convert to fraction form
    2,985,789.63/4,478,684.46 = 991,245.63/x
  3. Step 3: Cross multiply
    2,985,789.63x = 4,478,684.46 × 991,245.63
  4. Step 4: Simplify right side
    2,985,789.63x = 4,439,476,399,123.91
  5. Step 5: Solve for x
    x = 4,439,476,399,123.91/2,985,789.63
  6. Step 6: Final answer
    x = 1,486,868.45

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Double scale
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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.