Home / 1,287,902.60-1,932,113.10-1,078,987.40

Finding the Fourth Proportional to 1,287,902.60, 1,932,113.10 and 1,078,987.40

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Solution

The fourth proportional to 1,287,902.60, 1,932,113.10 and 1,078,987.40 is: 1,618,698.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,902.60 : 1,932,113.10 = 1,078,987.40 : x
  2. Step 2: Convert to fraction form
    1,287,902.60/1,932,113.10 = 1,078,987.40/x
  3. Step 3: Cross multiply
    1,287,902.60x = 1,932,113.10 × 1,078,987.40
  4. Step 4: Simplify right side
    1,287,902.60x = 2,084,725,690,274.94
  5. Step 5: Solve for x
    x = 2,084,725,690,274.94/1,287,902.60
  6. Step 6: Final answer
    x = 1,618,698.25

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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.