Home / 690,221,676.51-952,529,418.61-408,205,866.85

Finding the Fourth Proportional to 690,221,676.51, 952,529,418.61 and 408,205,866.85

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Solution

The fourth proportional to 690,221,676.51, 952,529,418.61 and 408,205,866.85 is: 563,337,997.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,221,676.51 : 952,529,418.61 = 408,205,866.85 : x
  2. Step 2: Convert to fraction form
    690,221,676.51/952,529,418.61 = 408,205,866.85/x
  3. Step 3: Cross multiply
    690,221,676.51x = 952,529,418.61 × 408,205,866.85
  4. Step 4: Simplify right side
    690,221,676.51x = 388,828,097,020,419,712
  5. Step 5: Solve for x
    x = 388,828,097,020,419,712/690,221,676.51
  6. Step 6: Final answer
    x = 563,337,997.42

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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.