Home / 780,288.40-1,170,432.60-219,322.90

Finding the Fourth Proportional to 780,288.40, 1,170,432.60 and 219,322.90

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Solution

The fourth proportional to 780,288.40, 1,170,432.60 and 219,322.90 is: 328,984.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,288.40 : 1,170,432.60 = 219,322.90 : x
  2. Step 2: Convert to fraction form
    780,288.40/1,170,432.60 = 219,322.90/x
  3. Step 3: Cross multiply
    780,288.40x = 1,170,432.60 × 219,322.90
  4. Step 4: Simplify right side
    780,288.40x = 256,702,672,086.54
  5. Step 5: Solve for x
    x = 256,702,672,086.54/780,288.40
  6. Step 6: Final answer
    x = 328,984.35

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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.