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Finding the Fourth Proportional to 738,181.56, 1,018,690.56 and 398,649.78

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Solution

The fourth proportional to 738,181.56, 1,018,690.56 and 398,649.78 is: 550,136.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,181.56 : 1,018,690.56 = 398,649.78 : x
  2. Step 2: Convert to fraction form
    738,181.56/1,018,690.56 = 398,649.78/x
  3. Step 3: Cross multiply
    738,181.56x = 1,018,690.56 × 398,649.78
  4. Step 4: Simplify right side
    738,181.56x = 406,100,767,632.08
  5. Step 5: Solve for x
    x = 406,100,767,632.08/738,181.56
  6. Step 6: Final answer
    x = 550,136.70

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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.