Home / 490,727.20-736,090.80-280,386.40

Finding the Fourth Proportional to 490,727.20, 736,090.80 and 280,386.40

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Solution

The fourth proportional to 490,727.20, 736,090.80 and 280,386.40 is: 420,579.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,727.20 : 736,090.80 = 280,386.40 : x
  2. Step 2: Convert to fraction form
    490,727.20/736,090.80 = 280,386.40/x
  3. Step 3: Cross multiply
    490,727.20x = 736,090.80 × 280,386.40
  4. Step 4: Simplify right side
    490,727.20x = 206,389,849,485.12
  5. Step 5: Solve for x
    x = 206,389,849,485.12/490,727.20
  6. Step 6: Final answer
    x = 420,579.60

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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.