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Finding the Fourth Proportional to 300,386.47, 450,623.43 and 90,040.81

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Solution

The fourth proportional to 300,386.47, 450,623.43 and 90,040.81 is: 135,074.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,386.47 : 450,623.43 = 90,040.81 : x
  2. Step 2: Convert to fraction form
    300,386.47/450,623.43 = 90,040.81/x
  3. Step 3: Cross multiply
    300,386.47x = 450,623.43 × 90,040.81
  4. Step 4: Simplify right side
    300,386.47x = 40,574,498,642.18
  5. Step 5: Solve for x
    x = 40,574,498,642.18/300,386.47
  6. Step 6: Final answer
    x = 135,074.32

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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.