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Finding the Fourth Proportional to 1,258,859.22, 1,736,483.92 and 890,922.44

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Solution

The fourth proportional to 1,258,859.22, 1,736,483.92 and 890,922.44 is: 1,228,947.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258,859.22 : 1,736,483.92 = 890,922.44 : x
  2. Step 2: Convert to fraction form
    1,258,859.22/1,736,483.92 = 890,922.44/x
  3. Step 3: Cross multiply
    1,258,859.22x = 1,736,483.92 × 890,922.44
  4. Step 4: Simplify right side
    1,258,859.22x = 1,547,072,498,152.51
  5. Step 5: Solve for x
    x = 1,547,072,498,152.51/1,258,859.22
  6. Step 6: Final answer
    x = 1,228,947.98

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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.