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Finding the Fourth Proportional to 450,276.89, 621,321.23 and 256,709.57

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Solution

The fourth proportional to 450,276.89, 621,321.23 and 256,709.57 is: 354,224.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,276.89 : 621,321.23 = 256,709.57 : x
  2. Step 2: Convert to fraction form
    450,276.89/621,321.23 = 256,709.57/x
  3. Step 3: Cross multiply
    450,276.89x = 621,321.23 × 256,709.57
  4. Step 4: Simplify right side
    450,276.89x = 159,499,103,320.34
  5. Step 5: Solve for x
    x = 159,499,103,320.34/450,276.89
  6. Step 6: Final answer
    x = 354,224.50

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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.