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Finding the Fourth Proportional to 1,986,073.50, 2,978,666.90 and 920,977.16

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Solution

The fourth proportional to 1,986,073.50, 2,978,666.90 and 920,977.16 is: 1,381,260.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986,073.50 : 2,978,666.90 = 920,977.16 : x
  2. Step 2: Convert to fraction form
    1,986,073.50/2,978,666.90 = 920,977.16/x
  3. Step 3: Cross multiply
    1,986,073.50x = 2,978,666.90 × 920,977.16
  4. Step 4: Simplify right side
    1,986,073.50x = 2,743,284,162,649.78
  5. Step 5: Solve for x
    x = 2,743,284,162,649.78/1,986,073.50
  6. Step 6: Final answer
    x = 1,381,260.14

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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.