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Finding the Fourth Proportional to 386,315.80, 579,473.70 and 366,632.80

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Solution

The fourth proportional to 386,315.80, 579,473.70 and 366,632.80 is: 549,949.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,315.80 : 579,473.70 = 366,632.80 : x
  2. Step 2: Convert to fraction form
    386,315.80/579,473.70 = 366,632.80/x
  3. Step 3: Cross multiply
    386,315.80x = 579,473.70 × 366,632.80
  4. Step 4: Simplify right side
    386,315.80x = 212,454,065,157.36
  5. Step 5: Solve for x
    x = 212,454,065,157.36/386,315.80
  6. Step 6: Final answer
    x = 549,949.20

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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.