Home / 839,310.80-1,258,820.40-306,557.60

Finding the Fourth Proportional to 839,310.80, 1,258,820.40 and 306,557.60

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Solution

The fourth proportional to 839,310.80, 1,258,820.40 and 306,557.60 is: 459,783.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,310.80 : 1,258,820.40 = 306,557.60 : x
  2. Step 2: Convert to fraction form
    839,310.80/1,258,820.40 = 306,557.60/x
  3. Step 3: Cross multiply
    839,310.80x = 1,258,820.40 × 306,557.60
  4. Step 4: Simplify right side
    839,310.80x = 385,900,960,655.04
  5. Step 5: Solve for x
    x = 385,900,960,655.04/839,310.80
  6. Step 6: Final answer
    x = 459,783.15

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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.