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Finding the Fourth Proportional to 605,219.93, 834,923.10 and 390,429.20

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Solution

The fourth proportional to 605,219.93, 834,923.10 and 390,429.20 is: 538,611.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,219.93 : 834,923.10 = 390,429.20 : x
  2. Step 2: Convert to fraction form
    605,219.93/834,923.10 = 390,429.20/x
  3. Step 3: Cross multiply
    605,219.93x = 834,923.10 × 390,429.20
  4. Step 4: Simplify right side
    605,219.93x = 325,978,357,994.52
  5. Step 5: Solve for x
    x = 325,978,357,994.52/605,219.93
  6. Step 6: Final answer
    x = 538,611.41

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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.