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Finding the Fourth Proportional to 559,419.12, 839,391.12 and 278,958.24

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Solution

The fourth proportional to 559,419.12, 839,391.12 and 278,958.24 is: 418,568.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,419.12 : 839,391.12 = 278,958.24 : x
  2. Step 2: Convert to fraction form
    559,419.12/839,391.12 = 278,958.24/x
  3. Step 3: Cross multiply
    559,419.12x = 839,391.12 × 278,958.24
  4. Step 4: Simplify right side
    559,419.12x = 234,155,069,506.83
  5. Step 5: Solve for x
    x = 234,155,069,506.83/559,419.12
  6. Step 6: Final answer
    x = 418,568.23

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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.