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Finding the Fourth Proportional to 858,507.60, 1,288,344.60 and 479,427.60

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Solution

The fourth proportional to 858,507.60, 1,288,344.60 and 479,427.60 is: 719,467.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,507.60 : 1,288,344.60 = 479,427.60 : x
  2. Step 2: Convert to fraction form
    858,507.60/1,288,344.60 = 479,427.60/x
  3. Step 3: Cross multiply
    858,507.60x = 1,288,344.60 × 479,427.60
  4. Step 4: Simplify right side
    858,507.60x = 617,667,959,550.96
  5. Step 5: Solve for x
    x = 617,667,959,550.96/858,507.60
  6. Step 6: Final answer
    x = 719,467.08

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Double scale
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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.