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Finding the Fourth Proportional to 821,624.40, 1,232,436.60 and 539,614.80

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Solution

The fourth proportional to 821,624.40, 1,232,436.60 and 539,614.80 is: 809,422.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,624.40 : 1,232,436.60 = 539,614.80 : x
  2. Step 2: Convert to fraction form
    821,624.40/1,232,436.60 = 539,614.80/x
  3. Step 3: Cross multiply
    821,624.40x = 1,232,436.60 × 539,614.80
  4. Step 4: Simplify right side
    821,624.40x = 665,041,029,421.68
  5. Step 5: Solve for x
    x = 665,041,029,421.68/821,624.40
  6. Step 6: Final answer
    x = 809,422.20

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1.5x scale

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.