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Finding the Fourth Proportional to 389,628.80, 584,443.20 and 366,300.80

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Solution

The fourth proportional to 389,628.80, 584,443.20 and 366,300.80 is: 549,451.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,628.80 : 584,443.20 = 366,300.80 : x
  2. Step 2: Convert to fraction form
    389,628.80/584,443.20 = 366,300.80/x
  3. Step 3: Cross multiply
    389,628.80x = 584,443.20 × 366,300.80
  4. Step 4: Simplify right side
    389,628.80x = 214,082,011,714.56
  5. Step 5: Solve for x
    x = 214,082,011,714.56/389,628.80
  6. Step 6: Final answer
    x = 549,451.20

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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.