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Finding the Fourth Proportional to 386,641.69, 533,800.26 and 300,437.85

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Solution

The fourth proportional to 386,641.69, 533,800.26 and 300,437.85 is: 414,786.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,641.69 : 533,800.26 = 300,437.85 : x
  2. Step 2: Convert to fraction form
    386,641.69/533,800.26 = 300,437.85/x
  3. Step 3: Cross multiply
    386,641.69x = 533,800.26 × 300,437.85
  4. Step 4: Simplify right side
    386,641.69x = 160,373,802,443.84
  5. Step 5: Solve for x
    x = 160,373,802,443.84/386,641.69
  6. Step 6: Final answer
    x = 414,786.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.