Home / 678,686,680.02-1,018,033,271.39-205,989,829.47

Finding the Fourth Proportional to 678,686,680.02, 1,018,033,271.39 and 205,989,829.47

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Solution

The fourth proportional to 678,686,680.02, 1,018,033,271.39 and 205,989,829.47 is: 308,985,731.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,686,680.02 : 1,018,033,271.39 = 205,989,829.47 : x
  2. Step 2: Convert to fraction form
    678,686,680.02/1,018,033,271.39 = 205,989,829.47/x
  3. Step 3: Cross multiply
    678,686,680.02x = 1,018,033,271.39 × 205,989,829.47
  4. Step 4: Simplify right side
    678,686,680.02x = 209,704,499,965,354,016
  5. Step 5: Solve for x
    x = 209,704,499,965,354,016/678,686,680.02
  6. Step 6: Final answer
    x = 308,985,731.03

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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.