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Finding the Fourth Proportional to 611,858.12, 844,484.94 and 390,954.11

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Solution

The fourth proportional to 611,858.12, 844,484.94 and 390,954.11 is: 539,593.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,858.12 : 844,484.94 = 390,954.11 : x
  2. Step 2: Convert to fraction form
    611,858.12/844,484.94 = 390,954.11/x
  3. Step 3: Cross multiply
    611,858.12x = 844,484.94 × 390,954.11
  4. Step 4: Simplify right side
    611,858.12x = 330,154,853,903.68
  5. Step 5: Solve for x
    x = 330,154,853,903.68/611,858.12
  6. Step 6: Final answer
    x = 539,593.81

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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.