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Finding the Fourth Proportional to 508,459.79, 701,672.55 and 279,020.94

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Solution

The fourth proportional to 508,459.79, 701,672.55 and 279,020.94 is: 385,047.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,459.79 : 701,672.55 = 279,020.94 : x
  2. Step 2: Convert to fraction form
    508,459.79/701,672.55 = 279,020.94/x
  3. Step 3: Cross multiply
    508,459.79x = 701,672.55 × 279,020.94
  4. Step 4: Simplify right side
    508,459.79x = 195,781,334,473.20
  5. Step 5: Solve for x
    x = 195,781,334,473.20/508,459.79
  6. Step 6: Final answer
    x = 385,047.83

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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.