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Finding the Fourth Proportional to 509,763.52, 703,491.71 and 280,338.25

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Solution

The fourth proportional to 509,763.52, 703,491.71 and 280,338.25 is: 386,876.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,763.52 : 703,491.71 = 280,338.25 : x
  2. Step 2: Convert to fraction form
    509,763.52/703,491.71 = 280,338.25/x
  3. Step 3: Cross multiply
    509,763.52x = 703,491.71 × 280,338.25
  4. Step 4: Simplify right side
    509,763.52x = 197,215,630,777.59
  5. Step 5: Solve for x
    x = 197,215,630,777.59/509,763.52
  6. Step 6: Final answer
    x = 386,876.71

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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.