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Finding the Fourth Proportional to 949,991.40, 1,424,987.10 and 856,679.40

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Solution

The fourth proportional to 949,991.40, 1,424,987.10 and 856,679.40 is: 1,285,019.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    949,991.40 : 1,424,987.10 = 856,679.40 : x
  2. Step 2: Convert to fraction form
    949,991.40/1,424,987.10 = 856,679.40/x
  3. Step 3: Cross multiply
    949,991.40x = 1,424,987.10 × 856,679.40
  4. Step 4: Simplify right side
    949,991.40x = 1,220,757,093,835.74
  5. Step 5: Solve for x
    x = 1,220,757,093,835.74/949,991.40
  6. Step 6: Final answer
    x = 1,285,019.10

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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.