Home / 1,216,420.80-1,821,866.40-768,523.20

Finding the Fourth Proportional to 1,216,420.80, 1,821,866.40 and 768,523.20

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Solution

The fourth proportional to 1,216,420.80, 1,821,866.40 and 768,523.20 is: 1,151,038.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,420.80 : 1,821,866.40 = 768,523.20 : x
  2. Step 2: Convert to fraction form
    1,216,420.80/1,821,866.40 = 768,523.20/x
  3. Step 3: Cross multiply
    1,216,420.80x = 1,821,866.40 × 768,523.20
  4. Step 4: Simplify right side
    1,216,420.80x = 1,400,146,595,700.48
  5. Step 5: Solve for x
    x = 1,400,146,595,700.48/1,216,420.80
  6. Step 6: Final answer
    x = 1,151,038.03

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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.