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Finding the Fourth Proportional to 1,292,670,012.70, 1,939,005,019.05 and 898,128,214.30

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Solution

The fourth proportional to 1,292,670,012.70, 1,939,005,019.05 and 898,128,214.30 is: 1,347,192,321.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292,670,012.70 : 1,939,005,019.05 = 898,128,214.30 : x
  2. Step 2: Convert to fraction form
    1,292,670,012.70/1,939,005,019.05 = 898,128,214.30/x
  3. Step 3: Cross multiply
    1,292,670,012.70x = 1,939,005,019.05 × 898,128,214.30
  4. Step 4: Simplify right side
    1,292,670,012.70x = 1,741,475,115,278,113,792
  5. Step 5: Solve for x
    x = 1,741,475,115,278,113,792/1,292,670,012.70
  6. Step 6: Final answer
    x = 1,347,192,321.45

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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.