Home / 690,221,982.03-952,529,839.74-408,206,172.39

Finding the Fourth Proportional to 690,221,982.03, 952,529,839.74 and 408,206,172.39

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Solution

The fourth proportional to 690,221,982.03, 952,529,839.74 and 408,206,172.39 is: 563,338,418.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,221,982.03 : 952,529,839.74 = 408,206,172.39 : x
  2. Step 2: Convert to fraction form
    690,221,982.03/952,529,839.74 = 408,206,172.39/x
  3. Step 3: Cross multiply
    690,221,982.03x = 952,529,839.74 × 408,206,172.39
  4. Step 4: Simplify right side
    690,221,982.03x = 388,828,559,967,525,504
  5. Step 5: Solve for x
    x = 388,828,559,967,525,504/690,221,982.03
  6. Step 6: Final answer
    x = 563,338,418.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.