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Finding the Fourth Proportional to 400,940.21, 552,854.19 and 255,515.74

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Solution

The fourth proportional to 400,940.21, 552,854.19 and 255,515.74 is: 352,329.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,940.21 : 552,854.19 = 255,515.74 : x
  2. Step 2: Convert to fraction form
    400,940.21/552,854.19 = 255,515.74/x
  3. Step 3: Cross multiply
    400,940.21x = 552,854.19 × 255,515.74
  4. Step 4: Simplify right side
    400,940.21x = 141,262,944,705.68
  5. Step 5: Solve for x
    x = 141,262,944,705.68/400,940.21
  6. Step 6: Final answer
    x = 352,329.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.