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Finding the Fourth Proportional to 999,978.81, 1,500,154.98 and 400,986.84

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Solution

The fourth proportional to 999,978.81, 1,500,154.98 and 400,986.84 is: 601,555.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,978.81 : 1,500,154.98 = 400,986.84 : x
  2. Step 2: Convert to fraction form
    999,978.81/1,500,154.98 = 400,986.84/x
  3. Step 3: Cross multiply
    999,978.81x = 1,500,154.98 × 400,986.84
  4. Step 4: Simplify right side
    999,978.81x = 601,542,404,940.46
  5. Step 5: Solve for x
    x = 601,542,404,940.46/999,978.81
  6. Step 6: Final answer
    x = 601,555.15

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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.