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Finding the Fourth Proportional to 217,832,128.90, 305,730,255.50 and 217,832,128.90

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Solution

The fourth proportional to 217,832,128.90, 305,730,255.50 and 217,832,128.90 is: 305,730,255.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,832,128.90 : 305,730,255.50 = 217,832,128.90 : x
  2. Step 2: Convert to fraction form
    217,832,128.90/305,730,255.50 = 217,832,128.90/x
  3. Step 3: Cross multiply
    217,832,128.90x = 305,730,255.50 × 217,832,128.90
  4. Step 4: Simplify right side
    217,832,128.90x = 66,597,872,424,705,936
  5. Step 5: Solve for x
    x = 66,597,872,424,705,936/217,832,128.90
  6. Step 6: Final answer
    x = 305,730,255.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.