Home / 687,634,999.17-949,018,572.05-405,441,315.33

Finding the Fourth Proportional to 687,634,999.17, 949,018,572.05 and 405,441,315.33

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Solution

The fourth proportional to 687,634,999.17, 949,018,572.05 and 405,441,315.33 is: 559,557,524.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,634,999.17 : 949,018,572.05 = 405,441,315.33 : x
  2. Step 2: Convert to fraction form
    687,634,999.17/949,018,572.05 = 405,441,315.33/x
  3. Step 3: Cross multiply
    687,634,999.17x = 949,018,572.05 × 405,441,315.33
  4. Step 4: Simplify right side
    687,634,999.17x = 384,771,338,122,523,136
  5. Step 5: Solve for x
    x = 384,771,338,122,523,136/687,634,999.17
  6. Step 6: Final answer
    x = 559,557,524.83

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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.