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Finding the Fourth Proportional to 1,362,822.64, 1,880,617.57 and 781,922.63

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Solution

The fourth proportional to 1,362,822.64, 1,880,617.57 and 781,922.63 is: 1,079,008.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362,822.64 : 1,880,617.57 = 781,922.63 : x
  2. Step 2: Convert to fraction form
    1,362,822.64/1,880,617.57 = 781,922.63/x
  3. Step 3: Cross multiply
    1,362,822.64x = 1,880,617.57 × 781,922.63
  4. Step 4: Simplify right side
    1,362,822.64x = 1,470,497,439,105.35
  5. Step 5: Solve for x
    x = 1,470,497,439,105.35/1,362,822.64
  6. Step 6: Final answer
    x = 1,079,008.67

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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.