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Finding the Fourth Proportional to 508,407.20, 701,578.40 and 278,958.77

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Solution

The fourth proportional to 508,407.20, 701,578.40 and 278,958.77 is: 384,950.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,407.20 : 701,578.40 = 278,958.77 : x
  2. Step 2: Convert to fraction form
    508,407.20/701,578.40 = 278,958.77/x
  3. Step 3: Cross multiply
    508,407.20x = 701,578.40 × 278,958.77
  4. Step 4: Simplify right side
    508,407.20x = 195,711,442,619.88
  5. Step 5: Solve for x
    x = 195,711,442,619.88/508,407.20
  6. Step 6: Final answer
    x = 384,950.18

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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.