Home / 430,938.10-646,407.42-206,245.72

Finding the Fourth Proportional to 430,938.10, 646,407.42 and 206,245.72

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Solution

The fourth proportional to 430,938.10, 646,407.42 and 206,245.72 is: 309,368.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,938.10 : 646,407.42 = 206,245.72 : x
  2. Step 2: Convert to fraction form
    430,938.10/646,407.42 = 206,245.72/x
  3. Step 3: Cross multiply
    430,938.10x = 646,407.42 × 206,245.72
  4. Step 4: Simplify right side
    430,938.10x = 133,318,763,751.24
  5. Step 5: Solve for x
    x = 133,318,763,751.24/430,938.10
  6. Step 6: Final answer
    x = 309,368.71

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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.