Home / 390,120,989.85-538,346,282.81-222,824,398.77

Finding the Fourth Proportional to 390,120,989.85, 538,346,282.81 and 222,824,398.77

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Solution

The fourth proportional to 390,120,989.85, 538,346,282.81 and 222,824,398.77 is: 307,485,856.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,120,989.85 : 538,346,282.81 = 222,824,398.77 : x
  2. Step 2: Convert to fraction form
    390,120,989.85/538,346,282.81 = 222,824,398.77/x
  3. Step 3: Cross multiply
    390,120,989.85x = 538,346,282.81 × 222,824,398.77
  4. Step 4: Simplify right side
    390,120,989.85x = 119,956,686,796,088,512
  5. Step 5: Solve for x
    x = 119,956,686,796,088,512/390,120,989.85
  6. Step 6: Final answer
    x = 307,485,856.74

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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.