Home / 490,395.24-677,188.08-309,428.28

Finding the Fourth Proportional to 490,395.24, 677,188.08 and 309,428.28

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Solution

The fourth proportional to 490,395.24, 677,188.08 and 309,428.28 is: 427,290.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,395.24 : 677,188.08 = 309,428.28 : x
  2. Step 2: Convert to fraction form
    490,395.24/677,188.08 = 309,428.28/x
  3. Step 3: Cross multiply
    490,395.24x = 677,188.08 × 309,428.28
  4. Step 4: Simplify right side
    490,395.24x = 209,541,142,830.90
  5. Step 5: Solve for x
    x = 209,541,142,830.90/490,395.24
  6. Step 6: Final answer
    x = 427,290.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.