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Finding the Fourth Proportional to 528,958,036.69, 791,710,531.42 and 388,861,408.69

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Solution

The fourth proportional to 528,958,036.69, 791,710,531.42 and 388,861,408.69 is: 582,022,866.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,958,036.69 : 791,710,531.42 = 388,861,408.69 : x
  2. Step 2: Convert to fraction form
    528,958,036.69/791,710,531.42 = 388,861,408.69/x
  3. Step 3: Cross multiply
    528,958,036.69x = 791,710,531.42 × 388,861,408.69
  4. Step 4: Simplify right side
    528,958,036.69x = 307,865,672,522,689,664
  5. Step 5: Solve for x
    x = 307,865,672,522,689,664/528,958,036.69
  6. Step 6: Final answer
    x = 582,022,866.03

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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.