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Finding the Fourth Proportional to 430,373.72, 645,596.72 and 130,856.90

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Solution

The fourth proportional to 430,373.72, 645,596.72 and 130,856.90 is: 196,296.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,373.72 : 645,596.72 = 130,856.90 : x
  2. Step 2: Convert to fraction form
    430,373.72/645,596.72 = 130,856.90/x
  3. Step 3: Cross multiply
    430,373.72x = 645,596.72 × 130,856.90
  4. Step 4: Simplify right side
    430,373.72x = 84,480,782,037.81
  5. Step 5: Solve for x
    x = 84,480,782,037.81/430,373.72
  6. Step 6: Final answer
    x = 196,296.33

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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.