Home / 389,455,423.20-537,446,512.80-213,240,216.96

Finding the Fourth Proportional to 389,455,423.20, 537,446,512.80 and 213,240,216.96

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Solution

The fourth proportional to 389,455,423.20, 537,446,512.80 and 213,240,216.96 is: 294,270,420.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,455,423.20 : 537,446,512.80 = 213,240,216.96 : x
  2. Step 2: Convert to fraction form
    389,455,423.20/537,446,512.80 = 213,240,216.96/x
  3. Step 3: Cross multiply
    389,455,423.20x = 537,446,512.80 × 213,240,216.96
  4. Step 4: Simplify right side
    389,455,423.20x = 114,605,210,993,867,408
  5. Step 5: Solve for x
    x = 114,605,210,993,867,408/389,455,423.20
  6. Step 6: Final answer
    x = 294,270,420.10

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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.