Home / 779,611.50-1,075,863.87-421,915.50

Finding the Fourth Proportional to 779,611.50, 1,075,863.87 and 421,915.50

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Solution

The fourth proportional to 779,611.50, 1,075,863.87 and 421,915.50 is: 582,243.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    779,611.50 : 1,075,863.87 = 421,915.50 : x
  2. Step 2: Convert to fraction form
    779,611.50/1,075,863.87 = 421,915.50/x
  3. Step 3: Cross multiply
    779,611.50x = 1,075,863.87 × 421,915.50
  4. Step 4: Simplify right side
    779,611.50x = 453,923,642,642.99
  5. Step 5: Solve for x
    x = 453,923,642,642.99/779,611.50
  6. Step 6: Final answer
    x = 582,243.39

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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.