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Finding the Fourth Proportional to 520,228.80, 780,148.80 and 204,620.40

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Solution

The fourth proportional to 520,228.80, 780,148.80 and 204,620.40 is: 306,854.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,228.80 : 780,148.80 = 204,620.40 : x
  2. Step 2: Convert to fraction form
    520,228.80/780,148.80 = 204,620.40/x
  3. Step 3: Cross multiply
    520,228.80x = 780,148.80 × 204,620.40
  4. Step 4: Simplify right side
    520,228.80x = 159,634,359,515.52
  5. Step 5: Solve for x
    x = 159,634,359,515.52/520,228.80
  6. Step 6: Final answer
    x = 306,854.14

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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.