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Finding the Fourth Proportional to 1,300,643.10, 1,950,964.65 and 670,787.10

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Solution

The fourth proportional to 1,300,643.10, 1,950,964.65 and 670,787.10 is: 1,006,180.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,300,643.10 : 1,950,964.65 = 670,787.10 : x
  2. Step 2: Convert to fraction form
    1,300,643.10/1,950,964.65 = 670,787.10/x
  3. Step 3: Cross multiply
    1,300,643.10x = 1,950,964.65 × 670,787.10
  4. Step 4: Simplify right side
    1,300,643.10x = 1,308,681,919,776.01
  5. Step 5: Solve for x
    x = 1,308,681,919,776.01/1,300,643.10
  6. Step 6: Final answer
    x = 1,006,180.65

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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.