Home / 390,032,166-538,251,324.18-211,421,904.14

Finding the Fourth Proportional to 390,032,166, 538,251,324.18 and 211,421,904.14

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Solution

The fourth proportional to 390,032,166, 538,251,324.18 and 211,421,904.14 is: 291,765,986.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,032,166 : 538,251,324.18 = 211,421,904.14 : x
  2. Step 2: Convert to fraction form
    390,032,166/538,251,324.18 = 211,421,904.14/x
  3. Step 3: Cross multiply
    390,032,166x = 538,251,324.18 × 211,421,904.14
  4. Step 4: Simplify right side
    390,032,166x = 113,798,119,864,012,000
  5. Step 5: Solve for x
    x = 113,798,119,864,012,000/390,032,166
  6. Step 6: Final answer
    x = 291,765,986.97

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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.