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Finding the Fourth Proportional to 309,702.15, 426,936.60 and 218,897.91

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Solution

The fourth proportional to 309,702.15, 426,936.60 and 218,897.91 is: 301,759.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,702.15 : 426,936.60 = 218,897.91 : x
  2. Step 2: Convert to fraction form
    309,702.15/426,936.60 = 218,897.91/x
  3. Step 3: Cross multiply
    309,702.15x = 426,936.60 × 218,897.91
  4. Step 4: Simplify right side
    309,702.15x = 93,455,529,442.51
  5. Step 5: Solve for x
    x = 93,455,529,442.51/309,702.15
  6. Step 6: Final answer
    x = 301,759.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.