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Finding the Fourth Proportional to 486,124.80, 729,187.20 and 427,075.80

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Solution

The fourth proportional to 486,124.80, 729,187.20 and 427,075.80 is: 640,613.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,124.80 : 729,187.20 = 427,075.80 : x
  2. Step 2: Convert to fraction form
    486,124.80/729,187.20 = 427,075.80/x
  3. Step 3: Cross multiply
    486,124.80x = 729,187.20 × 427,075.80
  4. Step 4: Simplify right side
    486,124.80x = 311,418,206,789.76
  5. Step 5: Solve for x
    x = 311,418,206,789.76/486,124.80
  6. Step 6: Final answer
    x = 640,613.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.