Home / 385,101,118.89-531,438,999.30-208,888,901.48

Finding the Fourth Proportional to 385,101,118.89, 531,438,999.30 and 208,888,901.48

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Solution

The fourth proportional to 385,101,118.89, 531,438,999.30 and 208,888,901.48 is: 288,266,388.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,101,118.89 : 531,438,999.30 = 208,888,901.48 : x
  2. Step 2: Convert to fraction form
    385,101,118.89/531,438,999.30 = 208,888,901.48/x
  3. Step 3: Cross multiply
    385,101,118.89x = 531,438,999.30 × 208,888,901.48
  4. Step 4: Simplify right side
    385,101,118.89x = 111,011,708,767,407,488
  5. Step 5: Solve for x
    x = 111,011,708,767,407,488/385,101,118.89
  6. Step 6: Final answer
    x = 288,266,388.55

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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.