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Finding the Fourth Proportional to 1,263,042.86, 1,742,978.55 and 690,070.70

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Solution

The fourth proportional to 1,263,042.86, 1,742,978.55 and 690,070.70 is: 952,286.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263,042.86 : 1,742,978.55 = 690,070.70 : x
  2. Step 2: Convert to fraction form
    1,263,042.86/1,742,978.55 = 690,070.70/x
  3. Step 3: Cross multiply
    1,263,042.86x = 1,742,978.55 × 690,070.70
  4. Step 4: Simplify right side
    1,263,042.86x = 1,202,778,428,083.48
  5. Step 5: Solve for x
    x = 1,202,778,428,083.48/1,263,042.86
  6. Step 6: Final answer
    x = 952,286.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.