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Finding the Fourth Proportional to 780,000.80, 1,095,150.40 and 780,000.80

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Solution

The fourth proportional to 780,000.80, 1,095,150.40 and 780,000.80 is: 1,095,150.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,000.80 : 1,095,150.40 = 780,000.80 : x
  2. Step 2: Convert to fraction form
    780,000.80/1,095,150.40 = 780,000.80/x
  3. Step 3: Cross multiply
    780,000.80x = 1,095,150.40 × 780,000.80
  4. Step 4: Simplify right side
    780,000.80x = 854,218,188,120.32
  5. Step 5: Solve for x
    x = 854,218,188,120.32/780,000.80
  6. Step 6: Final answer
    x = 1,095,150.40

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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.