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Finding the Fourth Proportional to 256,307.17, 353,720.28 and 143,129.92

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Solution

The fourth proportional to 256,307.17, 353,720.28 and 143,129.92 is: 197,528.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,307.17 : 353,720.28 = 143,129.92 : x
  2. Step 2: Convert to fraction form
    256,307.17/353,720.28 = 143,129.92/x
  3. Step 3: Cross multiply
    256,307.17x = 353,720.28 × 143,129.92
  4. Step 4: Simplify right side
    256,307.17x = 50,627,955,378.78
  5. Step 5: Solve for x
    x = 50,627,955,378.78/256,307.17
  6. Step 6: Final answer
    x = 197,528.44

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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.