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Finding the Fourth Proportional to 586,659.38, 809,589.94 and 318,387.38

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Solution

The fourth proportional to 586,659.38, 809,589.94 and 318,387.38 is: 439,374.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,659.38 : 809,589.94 = 318,387.38 : x
  2. Step 2: Convert to fraction form
    586,659.38/809,589.94 = 318,387.38/x
  3. Step 3: Cross multiply
    586,659.38x = 809,589.94 × 318,387.38
  4. Step 4: Simplify right side
    586,659.38x = 257,763,215,027.04
  5. Step 5: Solve for x
    x = 257,763,215,027.04/586,659.38
  6. Step 6: Final answer
    x = 439,374.58

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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.