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Finding the Fourth Proportional to 386,292.64, 579,491.88 and 120,003.52

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Solution

The fourth proportional to 386,292.64, 579,491.88 and 120,003.52 is: 180,021.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,292.64 : 579,491.88 = 120,003.52 : x
  2. Step 2: Convert to fraction form
    386,292.64/579,491.88 = 120,003.52/x
  3. Step 3: Cross multiply
    386,292.64x = 579,491.88 × 120,003.52
  4. Step 4: Simplify right side
    386,292.64x = 69,541,065,411.42
  5. Step 5: Solve for x
    x = 69,541,065,411.42/386,292.64
  6. Step 6: Final answer
    x = 180,021.72

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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.