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Finding the Fourth Proportional to 210,326,231.70, 315,489,347.55 and 210,326,231.70

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Solution

The fourth proportional to 210,326,231.70, 315,489,347.55 and 210,326,231.70 is: 315,489,347.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,326,231.70 : 315,489,347.55 = 210,326,231.70 : x
  2. Step 2: Convert to fraction form
    210,326,231.70/315,489,347.55 = 210,326,231.70/x
  3. Step 3: Cross multiply
    210,326,231.70x = 315,489,347.55 × 210,326,231.70
  4. Step 4: Simplify right side
    210,326,231.70x = 66,355,685,611,683,128
  5. Step 5: Solve for x
    x = 66,355,685,611,683,128/210,326,231.70
  6. Step 6: Final answer
    x = 315,489,347.55

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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.