Home / 393,120,136.40-589,680,204.60-388,018,302.80

Finding the Fourth Proportional to 393,120,136.40, 589,680,204.60 and 388,018,302.80

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Solution

The fourth proportional to 393,120,136.40, 589,680,204.60 and 388,018,302.80 is: 582,027,454.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,120,136.40 : 589,680,204.60 = 388,018,302.80 : x
  2. Step 2: Convert to fraction form
    393,120,136.40/589,680,204.60 = 388,018,302.80/x
  3. Step 3: Cross multiply
    393,120,136.40x = 589,680,204.60 × 388,018,302.80
  4. Step 4: Simplify right side
    393,120,136.40x = 228,806,712,183,648,768
  5. Step 5: Solve for x
    x = 228,806,712,183,648,768/393,120,136.40
  6. Step 6: Final answer
    x = 582,027,454.20

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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.