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Finding the Fourth Proportional to 255,429.79, 352,520.81 and 140,720.19

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Solution

The fourth proportional to 255,429.79, 352,520.81 and 140,720.19 is: 194,209.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,429.79 : 352,520.81 = 140,720.19 : x
  2. Step 2: Convert to fraction form
    255,429.79/352,520.81 = 140,720.19/x
  3. Step 3: Cross multiply
    255,429.79x = 352,520.81 × 140,720.19
  4. Step 4: Simplify right side
    255,429.79x = 49,606,795,362.15
  5. Step 5: Solve for x
    x = 49,606,795,362.15/255,429.79
  6. Step 6: Final answer
    x = 194,209.12

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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.