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Finding the Fourth Proportional to 279,999.48, 386,276.28 and 189,322.68

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Solution

The fourth proportional to 279,999.48, 386,276.28 and 189,322.68 is: 261,182.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,999.48 : 386,276.28 = 189,322.68 : x
  2. Step 2: Convert to fraction form
    279,999.48/386,276.28 = 189,322.68/x
  3. Step 3: Cross multiply
    279,999.48x = 386,276.28 × 189,322.68
  4. Step 4: Simplify right side
    279,999.48x = 73,130,860,550.03
  5. Step 5: Solve for x
    x = 73,130,860,550.03/279,999.48
  6. Step 6: Final answer
    x = 261,182.13

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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.