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Finding the Fourth Proportional to 430,339.60, 645,399.60 and 305,155.60

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Solution

The fourth proportional to 430,339.60, 645,399.60 and 305,155.60 is: 457,655.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,339.60 : 645,399.60 = 305,155.60 : x
  2. Step 2: Convert to fraction form
    430,339.60/645,399.60 = 305,155.60/x
  3. Step 3: Cross multiply
    430,339.60x = 645,399.60 × 305,155.60
  4. Step 4: Simplify right side
    430,339.60x = 196,947,302,177.76
  5. Step 5: Solve for x
    x = 196,947,302,177.76/430,339.60
  6. Step 6: Final answer
    x = 457,655.54

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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.