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Finding the Fourth Proportional to 490,800.90, 677,077.91 and 286,860.42

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Solution

The fourth proportional to 490,800.90, 677,077.91 and 286,860.42 is: 395,734.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,800.90 : 677,077.91 = 286,860.42 : x
  2. Step 2: Convert to fraction form
    490,800.90/677,077.91 = 286,860.42/x
  3. Step 3: Cross multiply
    490,800.90x = 677,077.91 × 286,860.42
  4. Step 4: Simplify right side
    490,800.90x = 194,226,852,201.02
  5. Step 5: Solve for x
    x = 194,226,852,201.02/490,800.90
  6. Step 6: Final answer
    x = 395,734.51

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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.