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Finding the Fourth Proportional to 426,198.60, 638,520.30 and 346,883.40

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Solution

The fourth proportional to 426,198.60, 638,520.30 and 346,883.40 is: 519,692.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,198.60 : 638,520.30 = 346,883.40 : x
  2. Step 2: Convert to fraction form
    426,198.60/638,520.30 = 346,883.40/x
  3. Step 3: Cross multiply
    426,198.60x = 638,520.30 × 346,883.40
  4. Step 4: Simplify right side
    426,198.60x = 221,492,092,633.02
  5. Step 5: Solve for x
    x = 221,492,092,633.02/426,198.60
  6. Step 6: Final answer
    x = 519,692.21

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1.5x scale

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.