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Finding the Fourth Proportional to 1,179,936,000.10, 1,769,904,000.15 and 812,603,980.90

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Solution

The fourth proportional to 1,179,936,000.10, 1,769,904,000.15 and 812,603,980.90 is: 1,218,905,971.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179,936,000.10 : 1,769,904,000.15 = 812,603,980.90 : x
  2. Step 2: Convert to fraction form
    1,179,936,000.10/1,769,904,000.15 = 812,603,980.90/x
  3. Step 3: Cross multiply
    1,179,936,000.10x = 1,769,904,000.15 × 812,603,980.90
  4. Step 4: Simplify right side
    1,179,936,000.10x = 1,438,231,036,332,724,224
  5. Step 5: Solve for x
    x = 1,438,231,036,332,724,224/1,179,936,000.10
  6. Step 6: Final answer
    x = 1,218,905,971.35

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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.