Home / 858,836,099.80-1,288,254,149.70-398,621,315.80

Finding the Fourth Proportional to 858,836,099.80, 1,288,254,149.70 and 398,621,315.80

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Solution

The fourth proportional to 858,836,099.80, 1,288,254,149.70 and 398,621,315.80 is: 597,931,973.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,836,099.80 : 1,288,254,149.70 = 398,621,315.80 : x
  2. Step 2: Convert to fraction form
    858,836,099.80/1,288,254,149.70 = 398,621,315.80/x
  3. Step 3: Cross multiply
    858,836,099.80x = 1,288,254,149.70 × 398,621,315.80
  4. Step 4: Simplify right side
    858,836,099.80x = 513,525,564,238,224,192
  5. Step 5: Solve for x
    x = 513,525,564,238,224,192/858,836,099.80
  6. Step 6: Final answer
    x = 597,931,973.70

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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.