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Finding the Fourth Proportional to 506,790.09, 699,376.55 and 280,456.65

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Solution

The fourth proportional to 506,790.09, 699,376.55 and 280,456.65 is: 387,033.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    506,790.09 : 699,376.55 = 280,456.65 : x
  2. Step 2: Convert to fraction form
    506,790.09/699,376.55 = 280,456.65/x
  3. Step 3: Cross multiply
    506,790.09x = 699,376.55 × 280,456.65
  4. Step 4: Simplify right side
    506,790.09x = 196,144,802,899.27
  5. Step 5: Solve for x
    x = 196,144,802,899.27/506,790.09
  6. Step 6: Final answer
    x = 387,033.62

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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.