Home / 390,290.22-582,137.64-378,477.18

Finding the Fourth Proportional to 390,290.22, 582,137.64 and 378,477.18

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Solution

The fourth proportional to 390,290.22, 582,137.64 and 378,477.18 is: 564,517.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,290.22 : 582,137.64 = 378,477.18 : x
  2. Step 2: Convert to fraction form
    390,290.22/582,137.64 = 378,477.18/x
  3. Step 3: Cross multiply
    390,290.22x = 582,137.64 × 378,477.18
  4. Step 4: Simplify right side
    390,290.22x = 220,325,812,359.06
  5. Step 5: Solve for x
    x = 220,325,812,359.06/390,290.22
  6. Step 6: Final answer
    x = 564,517.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.