Home / 657,673,726.79-986,215,738.82-391,904,781.98

Finding the Fourth Proportional to 657,673,726.79, 986,215,738.82 and 391,904,781.98

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Solution

The fourth proportional to 657,673,726.79, 986,215,738.82 and 391,904,781.98 is: 587,681,472.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,673,726.79 : 986,215,738.82 = 391,904,781.98 : x
  2. Step 2: Convert to fraction form
    657,673,726.79/986,215,738.82 = 391,904,781.98/x
  3. Step 3: Cross multiply
    657,673,726.79x = 986,215,738.82 × 391,904,781.98
  4. Step 4: Simplify right side
    657,673,726.79x = 386,502,664,100,606,144
  5. Step 5: Solve for x
    x = 386,502,664,100,606,144/657,673,726.79
  6. Step 6: Final answer
    x = 587,681,472.37

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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.