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Finding the Fourth Proportional to 1,425,880.17, 1,966,978.62 and 966,839.40

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Solution

The fourth proportional to 1,425,880.17, 1,966,978.62 and 966,839.40 is: 1,333,739.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,425,880.17 : 1,966,978.62 = 966,839.40 : x
  2. Step 2: Convert to fraction form
    1,425,880.17/1,966,978.62 = 966,839.40/x
  3. Step 3: Cross multiply
    1,425,880.17x = 1,966,978.62 × 966,839.40
  4. Step 4: Simplify right side
    1,425,880.17x = 1,901,752,428,773.63
  5. Step 5: Solve for x
    x = 1,901,752,428,773.63/1,425,880.17
  6. Step 6: Final answer
    x = 1,333,739.31

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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.