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Finding the Fourth Proportional to 1,298,893.94, 1,947,515.43 and 1,139,290.34

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Solution

The fourth proportional to 1,298,893.94, 1,947,515.43 and 1,139,290.34 is: 1,708,211.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298,893.94 : 1,947,515.43 = 1,139,290.34 : x
  2. Step 2: Convert to fraction form
    1,298,893.94/1,947,515.43 = 1,139,290.34/x
  3. Step 3: Cross multiply
    1,298,893.94x = 1,947,515.43 × 1,139,290.34
  4. Step 4: Simplify right side
    1,298,893.94x = 2,218,785,516,399.95
  5. Step 5: Solve for x
    x = 2,218,785,516,399.95/1,298,893.94
  6. Step 6: Final answer
    x = 1,708,211.46

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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.