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Finding the Fourth Proportional to 493,638, 740,145.95 and 418,784.28

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Solution

The fourth proportional to 493,638, 740,145.95 and 418,784.28 is: 627,912.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,638 : 740,145.95 = 418,784.28 : x
  2. Step 2: Convert to fraction form
    493,638/740,145.95 = 418,784.28/x
  3. Step 3: Cross multiply
    493,638x = 740,145.95 × 418,784.28
  4. Step 4: Simplify right side
    493,638x = 309,961,488,765.67
  5. Step 5: Solve for x
    x = 309,961,488,765.67/493,638
  6. Step 6: Final answer
    x = 627,912.54

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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.