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Finding the Fourth Proportional to 262,872,690.40, 394,271,710.80 and 90,357,464.80

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Solution

The fourth proportional to 262,872,690.40, 394,271,710.80 and 90,357,464.80 is: 135,523,367.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,872,690.40 : 394,271,710.80 = 90,357,464.80 : x
  2. Step 2: Convert to fraction form
    262,872,690.40/394,271,710.80 = 90,357,464.80/x
  3. Step 3: Cross multiply
    262,872,690.40x = 394,271,710.80 × 90,357,464.80
  4. Step 4: Simplify right side
    262,872,690.40x = 35,625,392,230,246,780
  5. Step 5: Solve for x
    x = 35,625,392,230,246,780/262,872,690.40
  6. Step 6: Final answer
    x = 135,523,367.51

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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.