Home / 390,405,478.73-538,765,057.67-214,190,271.95

Finding the Fourth Proportional to 390,405,478.73, 538,765,057.67 and 214,190,271.95

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Solution

The fourth proportional to 390,405,478.73, 538,765,057.67 and 214,190,271.95 is: 295,585,591.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,405,478.73 : 538,765,057.67 = 214,190,271.95 : x
  2. Step 2: Convert to fraction form
    390,405,478.73/538,765,057.67 = 214,190,271.95/x
  3. Step 3: Cross multiply
    390,405,478.73x = 538,765,057.67 × 214,190,271.95
  4. Step 4: Simplify right side
    390,405,478.73x = 115,398,234,215,729,952
  5. Step 5: Solve for x
    x = 115,398,234,215,729,952/390,405,478.73
  6. Step 6: Final answer
    x = 295,585,591.15

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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.