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Finding the Fourth Proportional to 393,660,948.80, 590,491,423.20 and 240,605,940.80

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Solution

The fourth proportional to 393,660,948.80, 590,491,423.20 and 240,605,940.80 is: 360,908,911.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,660,948.80 : 590,491,423.20 = 240,605,940.80 : x
  2. Step 2: Convert to fraction form
    393,660,948.80/590,491,423.20 = 240,605,940.80/x
  3. Step 3: Cross multiply
    393,660,948.80x = 590,491,423.20 × 240,605,940.80
  4. Step 4: Simplify right side
    393,660,948.80x = 142,075,744,413,366,960
  5. Step 5: Solve for x
    x = 142,075,744,413,366,960/393,660,948.80
  6. Step 6: Final answer
    x = 360,908,911.20

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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.