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Finding the Fourth Proportional to 1,605,856, 2,216,081.28 and 890,464

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Solution

The fourth proportional to 1,605,856, 2,216,081.28 and 890,464 is: 1,228,840.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605,856 : 2,216,081.28 = 890,464 : x
  2. Step 2: Convert to fraction form
    1,605,856/2,216,081.28 = 890,464/x
  3. Step 3: Cross multiply
    1,605,856x = 2,216,081.28 × 890,464
  4. Step 4: Simplify right side
    1,605,856x = 1,973,340,600,913.92
  5. Step 5: Solve for x
    x = 1,973,340,600,913.92/1,605,856
  6. Step 6: Final answer
    x = 1,228,840.32

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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.