Home / 690,222,389.16-952,530,399.69-408,206,579.49

Finding the Fourth Proportional to 690,222,389.16, 952,530,399.69 and 408,206,579.49

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Solution

The fourth proportional to 690,222,389.16, 952,530,399.69 and 408,206,579.49 is: 563,338,979.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,222,389.16 : 952,530,399.69 = 408,206,579.49 : x
  2. Step 2: Convert to fraction form
    690,222,389.16/952,530,399.69 = 408,206,579.49/x
  3. Step 3: Cross multiply
    690,222,389.16x = 952,530,399.69 × 408,206,579.49
  4. Step 4: Simplify right side
    690,222,389.16x = 388,829,176,317,697,472
  5. Step 5: Solve for x
    x = 388,829,176,317,697,472/690,222,389.16
  6. Step 6: Final answer
    x = 563,338,979.47

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Double scale
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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.