Home / 1,278,385.80-1,915,245.90-779,166.60

Finding the Fourth Proportional to 1,278,385.80, 1,915,245.90 and 779,166.60

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Solution

The fourth proportional to 1,278,385.80, 1,915,245.90 and 779,166.60 is: 1,167,328.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,385.80 : 1,915,245.90 = 779,166.60 : x
  2. Step 2: Convert to fraction form
    1,278,385.80/1,915,245.90 = 779,166.60/x
  3. Step 3: Cross multiply
    1,278,385.80x = 1,915,245.90 × 779,166.60
  4. Step 4: Simplify right side
    1,278,385.80x = 1,492,295,636,066.94
  5. Step 5: Solve for x
    x = 1,492,295,636,066.94/1,278,385.80
  6. Step 6: Final answer
    x = 1,167,328.08

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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.