Home / 390,429,406.53-538,793,625.34-211,813,294.36

Finding the Fourth Proportional to 390,429,406.53, 538,793,625.34 and 211,813,294.36

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Solution

The fourth proportional to 390,429,406.53, 538,793,625.34 and 211,813,294.36 is: 292,302,912.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,429,406.53 : 538,793,625.34 = 211,813,294.36 : x
  2. Step 2: Convert to fraction form
    390,429,406.53/538,793,625.34 = 211,813,294.36/x
  3. Step 3: Cross multiply
    390,429,406.53x = 538,793,625.34 × 211,813,294.36
  4. Step 4: Simplify right side
    390,429,406.53x = 114,123,652,762,373,920
  5. Step 5: Solve for x
    x = 114,123,652,762,373,920/390,429,406.53
  6. Step 6: Final answer
    x = 292,302,912.78

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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.