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Finding the Fourth Proportional to 386,723.40, 580,085.10 and 360,479.40

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Solution

The fourth proportional to 386,723.40, 580,085.10 and 360,479.40 is: 540,719.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,723.40 : 580,085.10 = 360,479.40 : x
  2. Step 2: Convert to fraction form
    386,723.40/580,085.10 = 360,479.40/x
  3. Step 3: Cross multiply
    386,723.40x = 580,085.10 × 360,479.40
  4. Step 4: Simplify right side
    386,723.40x = 209,108,728,796.94
  5. Step 5: Solve for x
    x = 209,108,728,796.94/386,723.40
  6. Step 6: Final answer
    x = 540,719.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.