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Finding the Fourth Proportional to 1,918,551.65, 2,647,607.01 and 1,047,387.71

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Solution

The fourth proportional to 1,918,551.65, 2,647,607.01 and 1,047,387.71 is: 1,445,398.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918,551.65 : 2,647,607.01 = 1,047,387.71 : x
  2. Step 2: Convert to fraction form
    1,918,551.65/2,647,607.01 = 1,047,387.71/x
  3. Step 3: Cross multiply
    1,918,551.65x = 2,647,607.01 × 1,047,387.71
  4. Step 4: Simplify right side
    1,918,551.65x = 2,773,071,043,183.85
  5. Step 5: Solve for x
    x = 2,773,071,043,183.85/1,918,551.65
  6. Step 6: Final answer
    x = 1,445,398.17

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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.