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Finding the Fourth Proportional to 415,459.28, 573,806.72 and 279,256.76

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Solution

The fourth proportional to 415,459.28, 573,806.72 and 279,256.76 is: 385,692.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,459.28 : 573,806.72 = 279,256.76 : x
  2. Step 2: Convert to fraction form
    415,459.28/573,806.72 = 279,256.76/x
  3. Step 3: Cross multiply
    415,459.28x = 573,806.72 × 279,256.76
  4. Step 4: Simplify right side
    415,459.28x = 160,239,405,493.43
  5. Step 5: Solve for x
    x = 160,239,405,493.43/415,459.28
  6. Step 6: Final answer
    x = 385,692.20

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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.