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Finding the Fourth Proportional to 450,379.80, 621,437.81 and 256,783.86

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Solution

The fourth proportional to 450,379.80, 621,437.81 and 256,783.86 is: 354,312.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,379.80 : 621,437.81 = 256,783.86 : x
  2. Step 2: Convert to fraction form
    450,379.80/621,437.81 = 256,783.86/x
  3. Step 3: Cross multiply
    450,379.80x = 621,437.81 × 256,783.86
  4. Step 4: Simplify right side
    450,379.80x = 159,575,198,317.83
  5. Step 5: Solve for x
    x = 159,575,198,317.83/450,379.80
  6. Step 6: Final answer
    x = 354,312.51

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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.