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Finding the Fourth Proportional to 807,786.10, 1,128,688.70 and 807,786.10

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Solution

The fourth proportional to 807,786.10, 1,128,688.70 and 807,786.10 is: 1,128,688.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,786.10 : 1,128,688.70 = 807,786.10 : x
  2. Step 2: Convert to fraction form
    807,786.10/1,128,688.70 = 807,786.10/x
  3. Step 3: Cross multiply
    807,786.10x = 1,128,688.70 × 807,786.10
  4. Step 4: Simplify right side
    807,786.10x = 911,739,043,087.07
  5. Step 5: Solve for x
    x = 911,739,043,087.07/807,786.10
  6. Step 6: Final answer
    x = 1,128,688.70

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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.