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Finding the Fourth Proportional to 1,289,620.90, 1,807,335.50 and 1,289,620.90

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Solution

The fourth proportional to 1,289,620.90, 1,807,335.50 and 1,289,620.90 is: 1,807,335.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,620.90 : 1,807,335.50 = 1,289,620.90 : x
  2. Step 2: Convert to fraction form
    1,289,620.90/1,807,335.50 = 1,289,620.90/x
  3. Step 3: Cross multiply
    1,289,620.90x = 1,807,335.50 × 1,289,620.90
  4. Step 4: Simplify right side
    1,289,620.90x = 2,330,777,634,111.95
  5. Step 5: Solve for x
    x = 2,330,777,634,111.95/1,289,620.90
  6. Step 6: Final answer
    x = 1,807,335.50

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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.