Home / 855,249.34-1,283,116.20-428,269.72

Finding the Fourth Proportional to 855,249.34, 1,283,116.20 and 428,269.72

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Solution

The fourth proportional to 855,249.34, 1,283,116.20 and 428,269.72 is: 642,525.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,249.34 : 1,283,116.20 = 428,269.72 : x
  2. Step 2: Convert to fraction form
    855,249.34/1,283,116.20 = 428,269.72/x
  3. Step 3: Cross multiply
    855,249.34x = 1,283,116.20 × 428,269.72
  4. Step 4: Simplify right side
    855,249.34x = 549,519,815,701.46
  5. Step 5: Solve for x
    x = 549,519,815,701.46/855,249.34
  6. Step 6: Final answer
    x = 642,525.86

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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.