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Finding the Fourth Proportional to 1,405,576.04, 1,939,671.78 and 760,991.08

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Solution

The fourth proportional to 1,405,576.04, 1,939,671.78 and 760,991.08 is: 1,050,155.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405,576.04 : 1,939,671.78 = 760,991.08 : x
  2. Step 2: Convert to fraction form
    1,405,576.04/1,939,671.78 = 760,991.08/x
  3. Step 3: Cross multiply
    1,405,576.04x = 1,939,671.78 × 760,991.08
  4. Step 4: Simplify right side
    1,405,576.04x = 1,476,072,922,707.72
  5. Step 5: Solve for x
    x = 1,476,072,922,707.72/1,405,576.04
  6. Step 6: Final answer
    x = 1,050,155.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.