Home / 388,134,069.32-535,620,959.52-211,921,519.28

Finding the Fourth Proportional to 388,134,069.32, 535,620,959.52 and 211,921,519.28

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Solution

The fourth proportional to 388,134,069.32, 535,620,959.52 and 211,921,519.28 is: 292,449,481.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,134,069.32 : 535,620,959.52 = 211,921,519.28 : x
  2. Step 2: Convert to fraction form
    388,134,069.32/535,620,959.52 = 211,921,519.28/x
  3. Step 3: Cross multiply
    388,134,069.32x = 535,620,959.52 × 211,921,519.28
  4. Step 4: Simplify right side
    388,134,069.32x = 113,509,607,499,689,776
  5. Step 5: Solve for x
    x = 113,509,607,499,689,776/388,134,069.32
  6. Step 6: Final answer
    x = 292,449,481.95

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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.