Home / 738,181.53-1,018,690.59-398,649.78

Finding the Fourth Proportional to 738,181.53, 1,018,690.59 and 398,649.78

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Solution

The fourth proportional to 738,181.53, 1,018,690.59 and 398,649.78 is: 550,136.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,181.53 : 1,018,690.59 = 398,649.78 : x
  2. Step 2: Convert to fraction form
    738,181.53/1,018,690.59 = 398,649.78/x
  3. Step 3: Cross multiply
    738,181.53x = 1,018,690.59 × 398,649.78
  4. Step 4: Simplify right side
    738,181.53x = 406,100,776,539.62
  5. Step 5: Solve for x
    x = 406,100,776,539.62/738,181.53
  6. Step 6: Final answer
    x = 550,136.74

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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.