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Finding the Fourth Proportional to 1,987,488.83, 2,742,036.08 and 1,299,563.36

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Solution

The fourth proportional to 1,987,488.83, 2,742,036.08 and 1,299,563.36 is: 1,792,940.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987,488.83 : 2,742,036.08 = 1,299,563.36 : x
  2. Step 2: Convert to fraction form
    1,987,488.83/2,742,036.08 = 1,299,563.36/x
  3. Step 3: Cross multiply
    1,987,488.83x = 2,742,036.08 × 1,299,563.36
  4. Step 4: Simplify right side
    1,987,488.83x = 3,563,449,618,750.71
  5. Step 5: Solve for x
    x = 3,563,449,618,750.71/1,987,488.83
  6. Step 6: Final answer
    x = 1,792,940.70

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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.