Home / 1,405,137.30-1,938,570.75-921,970.68

Finding the Fourth Proportional to 1,405,137.30, 1,938,570.75 and 921,970.68

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Solution

The fourth proportional to 1,405,137.30, 1,938,570.75 and 921,970.68 is: 1,271,979.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405,137.30 : 1,938,570.75 = 921,970.68 : x
  2. Step 2: Convert to fraction form
    1,405,137.30/1,938,570.75 = 921,970.68/x
  3. Step 3: Cross multiply
    1,405,137.30x = 1,938,570.75 × 921,970.68
  4. Step 4: Simplify right side
    1,405,137.30x = 1,787,305,392,605.61
  5. Step 5: Solve for x
    x = 1,787,305,392,605.61/1,405,137.30
  6. Step 6: Final answer
    x = 1,271,979.18

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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.