Home / 390,438,350.21-538,805,946.42-211,822,229.27

Finding the Fourth Proportional to 390,438,350.21, 538,805,946.42 and 211,822,229.27

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Solution

The fourth proportional to 390,438,350.21, 538,805,946.42 and 211,822,229.27 is: 292,315,231.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,438,350.21 : 538,805,946.42 = 211,822,229.27 : x
  2. Step 2: Convert to fraction form
    390,438,350.21/538,805,946.42 = 211,822,229.27/x
  3. Step 3: Cross multiply
    390,438,350.21x = 538,805,946.42 × 211,822,229.27
  4. Step 4: Simplify right side
    390,438,350.21x = 114,131,076,712,452,096
  5. Step 5: Solve for x
    x = 114,131,076,712,452,096/390,438,350.21
  6. Step 6: Final answer
    x = 292,315,231.46

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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.