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Finding the Fourth Proportional to 430,858.40, 646,287.60 and 341,628.80

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Solution

The fourth proportional to 430,858.40, 646,287.60 and 341,628.80 is: 512,443.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,858.40 : 646,287.60 = 341,628.80 : x
  2. Step 2: Convert to fraction form
    430,858.40/646,287.60 = 341,628.80/x
  3. Step 3: Cross multiply
    430,858.40x = 646,287.60 × 341,628.80
  4. Step 4: Simplify right side
    430,858.40x = 220,790,457,242.88
  5. Step 5: Solve for x
    x = 220,790,457,242.88/430,858.40
  6. Step 6: Final answer
    x = 512,443.20

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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.