Home / 390,032,165-538,251,322.80-211,421,903.14

Finding the Fourth Proportional to 390,032,165, 538,251,322.80 and 211,421,903.14

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Solution

The fourth proportional to 390,032,165, 538,251,322.80 and 211,421,903.14 is: 291,765,985.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,032,165 : 538,251,322.80 = 211,421,903.14 : x
  2. Step 2: Convert to fraction form
    390,032,165/538,251,322.80 = 211,421,903.14/x
  3. Step 3: Cross multiply
    390,032,165x = 538,251,322.80 × 211,421,903.14
  4. Step 4: Simplify right side
    390,032,165x = 113,798,119,033,998,448
  5. Step 5: Solve for x
    x = 113,798,119,033,998,448/390,032,165
  6. Step 6: Final answer
    x = 291,765,985.59

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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.