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Finding the Fourth Proportional to 586,531.20, 809,414.40 and 318,259.20

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Solution

The fourth proportional to 586,531.20, 809,414.40 and 318,259.20 is: 439,198.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,531.20 : 809,414.40 = 318,259.20 : x
  2. Step 2: Convert to fraction form
    586,531.20/809,414.40 = 318,259.20/x
  3. Step 3: Cross multiply
    586,531.20x = 809,414.40 × 318,259.20
  4. Step 4: Simplify right side
    586,531.20x = 257,603,579,412.48
  5. Step 5: Solve for x
    x = 257,603,579,412.48/586,531.20
  6. Step 6: Final answer
    x = 439,198.43

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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.