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Finding the Fourth Proportional to 1,309,061.64, 1,962,410.46 and 909,890.28

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Solution

The fourth proportional to 1,309,061.64, 1,962,410.46 and 909,890.28 is: 1,364,013.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309,061.64 : 1,962,410.46 = 909,890.28 : x
  2. Step 2: Convert to fraction form
    1,309,061.64/1,962,410.46 = 909,890.28/x
  3. Step 3: Cross multiply
    1,309,061.64x = 1,962,410.46 × 909,890.28
  4. Step 4: Simplify right side
    1,309,061.64x = 1,785,578,202,924.33
  5. Step 5: Solve for x
    x = 1,785,578,202,924.33/1,309,061.64
  6. Step 6: Final answer
    x = 1,364,013.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.