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Finding the Fourth Proportional to 778,965.40, 1,092,126.20 and 778,965.40

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Solution

The fourth proportional to 778,965.40, 1,092,126.20 and 778,965.40 is: 1,092,126.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,965.40 : 1,092,126.20 = 778,965.40 : x
  2. Step 2: Convert to fraction form
    778,965.40/1,092,126.20 = 778,965.40/x
  3. Step 3: Cross multiply
    778,965.40x = 1,092,126.20 × 778,965.40
  4. Step 4: Simplify right side
    778,965.40x = 850,728,522,233.48
  5. Step 5: Solve for x
    x = 850,728,522,233.48/778,965.40
  6. Step 6: Final answer
    x = 1,092,126.20

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1.5x scale

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.