Home / 1,287,641.20-1,929,809.40-719,021.20

Finding the Fourth Proportional to 1,287,641.20, 1,929,809.40 and 719,021.20

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Solution

The fourth proportional to 1,287,641.20, 1,929,809.40 and 719,021.20 is: 1,077,609.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,641.20 : 1,929,809.40 = 719,021.20 : x
  2. Step 2: Convert to fraction form
    1,287,641.20/1,929,809.40 = 719,021.20/x
  3. Step 3: Cross multiply
    1,287,641.20x = 1,929,809.40 × 719,021.20
  4. Step 4: Simplify right side
    1,287,641.20x = 1,387,573,870,559.28
  5. Step 5: Solve for x
    x = 1,387,573,870,559.28/1,287,641.20
  6. Step 6: Final answer
    x = 1,077,609.10

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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.