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Finding the Fourth Proportional to 1,422,887.55, 1,964,246.55 and 841,928.01

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Solution

The fourth proportional to 1,422,887.55, 1,964,246.55 and 841,928.01 is: 1,162,252.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422,887.55 : 1,964,246.55 = 841,928.01 : x
  2. Step 2: Convert to fraction form
    1,422,887.55/1,964,246.55 = 841,928.01/x
  3. Step 3: Cross multiply
    1,422,887.55x = 1,964,246.55 × 841,928.01
  4. Step 4: Simplify right side
    1,422,887.55x = 1,653,754,188,990.87
  5. Step 5: Solve for x
    x = 1,653,754,188,990.87/1,422,887.55
  6. Step 6: Final answer
    x = 1,162,252.20

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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.