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Finding the Fourth Proportional to 500,074.56, 690,095.80 and 285,218.21

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Solution

The fourth proportional to 500,074.56, 690,095.80 and 285,218.21 is: 393,597.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,074.56 : 690,095.80 = 285,218.21 : x
  2. Step 2: Convert to fraction form
    500,074.56/690,095.80 = 285,218.21/x
  3. Step 3: Cross multiply
    500,074.56x = 690,095.80 × 285,218.21
  4. Step 4: Simplify right side
    500,074.56x = 196,827,890,886.28
  5. Step 5: Solve for x
    x = 196,827,890,886.28/500,074.56
  6. Step 6: Final answer
    x = 393,597.09

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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.