Home / 1,209,947.60-1,814,921.40-421,979.60

Finding the Fourth Proportional to 1,209,947.60, 1,814,921.40 and 421,979.60

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Solution

The fourth proportional to 1,209,947.60, 1,814,921.40 and 421,979.60 is: 632,969.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,947.60 : 1,814,921.40 = 421,979.60 : x
  2. Step 2: Convert to fraction form
    1,209,947.60/1,814,921.40 = 421,979.60/x
  3. Step 3: Cross multiply
    1,209,947.60x = 1,814,921.40 × 421,979.60
  4. Step 4: Simplify right side
    1,209,947.60x = 765,859,806,403.44
  5. Step 5: Solve for x
    x = 765,859,806,403.44/1,209,947.60
  6. Step 6: Final answer
    x = 632,969.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.