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Finding the Fourth Proportional to 318,139.54, 439,006.46 and 187,296.42

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Solution

The fourth proportional to 318,139.54, 439,006.46 and 187,296.42 is: 258,453.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,139.54 : 439,006.46 = 187,296.42 : x
  2. Step 2: Convert to fraction form
    318,139.54/439,006.46 = 187,296.42/x
  3. Step 3: Cross multiply
    318,139.54x = 439,006.46 × 187,296.42
  4. Step 4: Simplify right side
    318,139.54x = 82,224,338,314.87
  5. Step 5: Solve for x
    x = 82,224,338,314.87/318,139.54
  6. Step 6: Final answer
    x = 258,453.69

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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.