Home / 390,292.22-582,140.62-378,479.18

Finding the Fourth Proportional to 390,292.22, 582,140.62 and 378,479.18

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Solution

The fourth proportional to 390,292.22, 582,140.62 and 378,479.18 is: 564,520.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,292.22 : 582,140.62 = 378,479.18 : x
  2. Step 2: Convert to fraction form
    390,292.22/582,140.62 = 378,479.18/x
  3. Step 3: Cross multiply
    390,292.22x = 582,140.62 × 378,479.18
  4. Step 4: Simplify right side
    390,292.22x = 220,328,104,502.29
  5. Step 5: Solve for x
    x = 220,328,104,502.29/390,292.22
  6. Step 6: Final answer
    x = 564,520.87

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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.