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Finding the Fourth Proportional to 1,223,978.83, 1,823,666.25 and 1,155,222.32

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Solution

The fourth proportional to 1,223,978.83, 1,823,666.25 and 1,155,222.32 is: 1,721,222.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223,978.83 : 1,823,666.25 = 1,155,222.32 : x
  2. Step 2: Convert to fraction form
    1,223,978.83/1,823,666.25 = 1,155,222.32/x
  3. Step 3: Cross multiply
    1,223,978.83x = 1,823,666.25 × 1,155,222.32
  4. Step 4: Simplify right side
    1,223,978.83x = 2,106,739,951,444.45
  5. Step 5: Solve for x
    x = 2,106,739,951,444.45/1,223,978.83
  6. Step 6: Final answer
    x = 1,721,222.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.