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Finding the Fourth Proportional to 256,637.28, 354,167.28 and 143,464.80

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Solution

The fourth proportional to 256,637.28, 354,167.28 and 143,464.80 is: 197,985.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,637.28 : 354,167.28 = 143,464.80 : x
  2. Step 2: Convert to fraction form
    256,637.28/354,167.28 = 143,464.80/x
  3. Step 3: Cross multiply
    256,637.28x = 354,167.28 × 143,464.80
  4. Step 4: Simplify right side
    256,637.28x = 50,810,537,991.74
  5. Step 5: Solve for x
    x = 50,810,537,991.74/256,637.28
  6. Step 6: Final answer
    x = 197,985.80

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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.