Home / 805,211.20-1,207,816.80-539,790.40

Finding the Fourth Proportional to 805,211.20, 1,207,816.80 and 539,790.40

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Solution

The fourth proportional to 805,211.20, 1,207,816.80 and 539,790.40 is: 809,685.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,211.20 : 1,207,816.80 = 539,790.40 : x
  2. Step 2: Convert to fraction form
    805,211.20/1,207,816.80 = 539,790.40/x
  3. Step 3: Cross multiply
    805,211.20x = 1,207,816.80 × 539,790.40
  4. Step 4: Simplify right side
    805,211.20x = 651,967,913,598.72
  5. Step 5: Solve for x
    x = 651,967,913,598.72/805,211.20
  6. Step 6: Final answer
    x = 809,685.60

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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.