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Finding the Fourth Proportional to 778,857.40, 1,091,975 and 778,857.40

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Solution

The fourth proportional to 778,857.40, 1,091,975 and 778,857.40 is: 1,091,975

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,857.40 : 1,091,975 = 778,857.40 : x
  2. Step 2: Convert to fraction form
    778,857.40/1,091,975 = 778,857.40/x
  3. Step 3: Cross multiply
    778,857.40x = 1,091,975 × 778,857.40
  4. Step 4: Simplify right side
    778,857.40x = 850,492,809,365
  5. Step 5: Solve for x
    x = 850,492,809,365/778,857.40
  6. Step 6: Final answer
    x = 1,091,975

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.