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Finding the Fourth Proportional to 279,918, 386,337.47 and 165,189.60

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Solution

The fourth proportional to 279,918, 386,337.47 and 165,189.60 is: 227,991.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,918 : 386,337.47 = 165,189.60 : x
  2. Step 2: Convert to fraction form
    279,918/386,337.47 = 165,189.60/x
  3. Step 3: Cross multiply
    279,918x = 386,337.47 × 165,189.60
  4. Step 4: Simplify right side
    279,918x = 63,818,931,308.36
  5. Step 5: Solve for x
    x = 63,818,931,308.36/279,918
  6. Step 6: Final answer
    x = 227,991.52

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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.