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Finding the Fourth Proportional to 388,461,330.60, 582,691,995.90 and 266,017,324.20

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Solution

The fourth proportional to 388,461,330.60, 582,691,995.90 and 266,017,324.20 is: 399,025,986.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,461,330.60 : 582,691,995.90 = 266,017,324.20 : x
  2. Step 2: Convert to fraction form
    388,461,330.60/582,691,995.90 = 266,017,324.20/x
  3. Step 3: Cross multiply
    388,461,330.60x = 582,691,995.90 × 266,017,324.20
  4. Step 4: Simplify right side
    388,461,330.60x = 155,006,165,582,075,360
  5. Step 5: Solve for x
    x = 155,006,165,582,075,360/388,461,330.60
  6. Step 6: Final answer
    x = 399,025,986.30

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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.