Home / 780,136.80-1,170,205.20-306,578.40

Finding the Fourth Proportional to 780,136.80, 1,170,205.20 and 306,578.40

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Solution

The fourth proportional to 780,136.80, 1,170,205.20 and 306,578.40 is: 459,867.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,136.80 : 1,170,205.20 = 306,578.40 : x
  2. Step 2: Convert to fraction form
    780,136.80/1,170,205.20 = 306,578.40/x
  3. Step 3: Cross multiply
    780,136.80x = 1,170,205.20 × 306,578.40
  4. Step 4: Simplify right side
    780,136.80x = 358,759,637,887.68
  5. Step 5: Solve for x
    x = 358,759,637,887.68/780,136.80
  6. Step 6: Final answer
    x = 459,867.60

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Similar ratio
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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.