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Finding the Fourth Proportional to 653,548.80, 979,934.40 and 338,620.80

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Solution

The fourth proportional to 653,548.80, 979,934.40 and 338,620.80 is: 507,729.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,548.80 : 979,934.40 = 338,620.80 : x
  2. Step 2: Convert to fraction form
    653,548.80/979,934.40 = 338,620.80/x
  3. Step 3: Cross multiply
    653,548.80x = 979,934.40 × 338,620.80
  4. Step 4: Simplify right side
    653,548.80x = 331,826,170,475.52
  5. Step 5: Solve for x
    x = 331,826,170,475.52/653,548.80
  6. Step 6: Final answer
    x = 507,729.75

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1.5x scale

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.