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Finding the Fourth Proportional to 664,702.63, 996,840.70 and 215,315.15

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Solution

The fourth proportional to 664,702.63, 996,840.70 and 215,315.15 is: 322,903.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,702.63 : 996,840.70 = 215,315.15 : x
  2. Step 2: Convert to fraction form
    664,702.63/996,840.70 = 215,315.15/x
  3. Step 3: Cross multiply
    664,702.63x = 996,840.70 × 215,315.15
  4. Step 4: Simplify right side
    664,702.63x = 214,634,899,324.11
  5. Step 5: Solve for x
    x = 214,634,899,324.11/664,702.63
  6. Step 6: Final answer
    x = 322,903.64

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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.