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Finding the Fourth Proportional to 483,873.40, 724,427.70 and 428,577.40

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Solution

The fourth proportional to 483,873.40, 724,427.70 and 428,577.40 is: 641,641.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,873.40 : 724,427.70 = 428,577.40 : x
  2. Step 2: Convert to fraction form
    483,873.40/724,427.70 = 428,577.40/x
  3. Step 3: Cross multiply
    483,873.40x = 724,427.70 × 428,577.40
  4. Step 4: Simplify right side
    483,873.40x = 310,473,340,153.98
  5. Step 5: Solve for x
    x = 310,473,340,153.98/483,873.40
  6. Step 6: Final answer
    x = 641,641.68

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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.