Home / 390,438,349.86-538,805,945.94-211,822,228.92

Finding the Fourth Proportional to 390,438,349.86, 538,805,945.94 and 211,822,228.92

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Solution

The fourth proportional to 390,438,349.86, 538,805,945.94 and 211,822,228.92 is: 292,315,230.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,438,349.86 : 538,805,945.94 = 211,822,228.92 : x
  2. Step 2: Convert to fraction form
    390,438,349.86/538,805,945.94 = 211,822,228.92/x
  3. Step 3: Cross multiply
    390,438,349.86x = 538,805,945.94 × 211,822,228.92
  4. Step 4: Simplify right side
    390,438,349.86x = 114,131,076,424,359,824
  5. Step 5: Solve for x
    x = 114,131,076,424,359,824/390,438,349.86
  6. Step 6: Final answer
    x = 292,315,230.98

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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.