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Finding the Fourth Proportional to 1,605,865, 2,216,093.70 and 890,473

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Solution

The fourth proportional to 1,605,865, 2,216,093.70 and 890,473 is: 1,228,852.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605,865 : 2,216,093.70 = 890,473 : x
  2. Step 2: Convert to fraction form
    1,605,865/2,216,093.70 = 890,473/x
  3. Step 3: Cross multiply
    1,605,865x = 2,216,093.70 × 890,473
  4. Step 4: Simplify right side
    1,605,865x = 1,973,371,605,320.10
  5. Step 5: Solve for x
    x = 1,973,371,605,320.10/1,605,865
  6. Step 6: Final answer
    x = 1,228,852.74

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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.