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Finding the Fourth Proportional to 858,405.60, 1,288,191.60 and 479,325.60

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Solution

The fourth proportional to 858,405.60, 1,288,191.60 and 479,325.60 is: 719,314.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,405.60 : 1,288,191.60 = 479,325.60 : x
  2. Step 2: Convert to fraction form
    858,405.60/1,288,191.60 = 479,325.60/x
  3. Step 3: Cross multiply
    858,405.60x = 1,288,191.60 × 479,325.60
  4. Step 4: Simplify right side
    858,405.60x = 617,463,211,584.96
  5. Step 5: Solve for x
    x = 617,463,211,584.96/858,405.60
  6. Step 6: Final answer
    x = 719,314.05

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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.