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Finding the Fourth Proportional to 256,605.80, 354,106.50 and 143,430.44

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Solution

The fourth proportional to 256,605.80, 354,106.50 and 143,430.44 is: 197,928.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,605.80 : 354,106.50 = 143,430.44 : x
  2. Step 2: Convert to fraction form
    256,605.80/354,106.50 = 143,430.44/x
  3. Step 3: Cross multiply
    256,605.80x = 354,106.50 × 143,430.44
  4. Step 4: Simplify right side
    256,605.80x = 50,789,651,101.86
  5. Step 5: Solve for x
    x = 50,789,651,101.86/256,605.80
  6. Step 6: Final answer
    x = 197,928.69

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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.