Home / 779,611.13-1,075,863.42-421,915.13

Finding the Fourth Proportional to 779,611.13, 1,075,863.42 and 421,915.13

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Solution

The fourth proportional to 779,611.13, 1,075,863.42 and 421,915.13 is: 582,242.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    779,611.13 : 1,075,863.42 = 421,915.13 : x
  2. Step 2: Convert to fraction form
    779,611.13/1,075,863.42 = 421,915.13/x
  3. Step 3: Cross multiply
    779,611.13x = 1,075,863.42 × 421,915.13
  4. Step 4: Simplify right side
    779,611.13x = 453,923,054,711.55
  5. Step 5: Solve for x
    x = 453,923,054,711.55/779,611.13
  6. Step 6: Final answer
    x = 582,242.91

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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.