Home / 612,748.20-916,935.30-388,216.20

Finding the Fourth Proportional to 612,748.20, 916,935.30 and 388,216.20

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Solution

The fourth proportional to 612,748.20, 916,935.30 and 388,216.20 is: 580,938.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,748.20 : 916,935.30 = 388,216.20 : x
  2. Step 2: Convert to fraction form
    612,748.20/916,935.30 = 388,216.20/x
  3. Step 3: Cross multiply
    612,748.20x = 916,935.30 × 388,216.20
  4. Step 4: Simplify right side
    612,748.20x = 355,969,137,811.86
  5. Step 5: Solve for x
    x = 355,969,137,811.86/612,748.20
  6. Step 6: Final answer
    x = 580,938.69

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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.