Home / 430,826.88-645,237.12-415,879.68

Finding the Fourth Proportional to 430,826.88, 645,237.12 and 415,879.68

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Solution

The fourth proportional to 430,826.88, 645,237.12 and 415,879.68 is: 622,851.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,826.88 : 645,237.12 = 415,879.68 : x
  2. Step 2: Convert to fraction form
    430,826.88/645,237.12 = 415,879.68/x
  3. Step 3: Cross multiply
    430,826.88x = 645,237.12 × 415,879.68
  4. Step 4: Simplify right side
    430,826.88x = 268,341,006,989.72
  5. Step 5: Solve for x
    x = 268,341,006,989.72/430,826.88
  6. Step 6: Final answer
    x = 622,851.13

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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.