Home / 1,390,809.60-2,086,214.40-681,292.80

Finding the Fourth Proportional to 1,390,809.60, 2,086,214.40 and 681,292.80

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Solution

The fourth proportional to 1,390,809.60, 2,086,214.40 and 681,292.80 is: 1,021,939.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,809.60 : 2,086,214.40 = 681,292.80 : x
  2. Step 2: Convert to fraction form
    1,390,809.60/2,086,214.40 = 681,292.80/x
  3. Step 3: Cross multiply
    1,390,809.60x = 2,086,214.40 × 681,292.80
  4. Step 4: Simplify right side
    1,390,809.60x = 1,421,322,849,976.32
  5. Step 5: Solve for x
    x = 1,421,322,849,976.32/1,390,809.60
  6. Step 6: Final answer
    x = 1,021,939.20

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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.