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Finding the Fourth Proportional to 256,498.32, 353,966.93 and 143,321.16

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Solution

The fourth proportional to 256,498.32, 353,966.93 and 143,321.16 is: 197,782.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,498.32 : 353,966.93 = 143,321.16 : x
  2. Step 2: Convert to fraction form
    256,498.32/353,966.93 = 143,321.16/x
  3. Step 3: Cross multiply
    256,498.32x = 353,966.93 × 143,321.16
  4. Step 4: Simplify right side
    256,498.32x = 50,730,950,292.63
  5. Step 5: Solve for x
    x = 50,730,950,292.63/256,498.32
  6. Step 6: Final answer
    x = 197,782.78

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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.