Home / 390,066,281.71-538,292,188.17-211,449,617.71

Finding the Fourth Proportional to 390,066,281.71, 538,292,188.17 and 211,449,617.71

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Solution

The fourth proportional to 390,066,281.71, 538,292,188.17 and 211,449,617.71 is: 291,800,862.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,066,281.71 : 538,292,188.17 = 211,449,617.71 : x
  2. Step 2: Convert to fraction form
    390,066,281.71/538,292,188.17 = 211,449,617.71/x
  3. Step 3: Cross multiply
    390,066,281.71x = 538,292,188.17 × 211,449,617.71
  4. Step 4: Simplify right side
    390,066,281.71x = 113,821,677,403,480,144
  5. Step 5: Solve for x
    x = 113,821,677,403,480,144/390,066,281.71
  6. Step 6: Final answer
    x = 291,800,862.42

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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.