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Finding the Fourth Proportional to 1,265,725.63, 1,899,901.05 and 847,921.15

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Solution

The fourth proportional to 1,265,725.63, 1,899,901.05 and 847,921.15 is: 1,272,761.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265,725.63 : 1,899,901.05 = 847,921.15 : x
  2. Step 2: Convert to fraction form
    1,265,725.63/1,899,901.05 = 847,921.15/x
  3. Step 3: Cross multiply
    1,265,725.63x = 1,899,901.05 × 847,921.15
  4. Step 4: Simplify right side
    1,265,725.63x = 1,610,966,283,202.21
  5. Step 5: Solve for x
    x = 1,610,966,283,202.21/1,265,725.63
  6. Step 6: Final answer
    x = 1,272,761.05

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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.