Home / 681,071.66-939,796.59-390,668.18

Finding the Fourth Proportional to 681,071.66, 939,796.59 and 390,668.18

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Solution

The fourth proportional to 681,071.66, 939,796.59 and 390,668.18 is: 539,074.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,071.66 : 939,796.59 = 390,668.18 : x
  2. Step 2: Convert to fraction form
    681,071.66/939,796.59 = 390,668.18/x
  3. Step 3: Cross multiply
    681,071.66x = 939,796.59 × 390,668.18
  4. Step 4: Simplify right side
    681,071.66x = 367,148,623,385.51
  5. Step 5: Solve for x
    x = 367,148,623,385.51/681,071.66
  6. Step 6: Final answer
    x = 539,074.88

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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.