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Finding the Fourth Proportional to 778,978.40, 1,092,144.40 and 778,978.40

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Solution

The fourth proportional to 778,978.40, 1,092,144.40 and 778,978.40 is: 1,092,144.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,978.40 : 1,092,144.40 = 778,978.40 : x
  2. Step 2: Convert to fraction form
    778,978.40/1,092,144.40 = 778,978.40/x
  3. Step 3: Cross multiply
    778,978.40x = 1,092,144.40 × 778,978.40
  4. Step 4: Simplify right side
    778,978.40x = 850,756,897,280.96
  5. Step 5: Solve for x
    x = 850,756,897,280.96/778,978.40
  6. Step 6: Final answer
    x = 1,092,144.40

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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.