Home / 842,139.20-1,263,208.80-486,970.40

Finding the Fourth Proportional to 842,139.20, 1,263,208.80 and 486,970.40

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Solution

The fourth proportional to 842,139.20, 1,263,208.80 and 486,970.40 is: 730,455.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    842,139.20 : 1,263,208.80 = 486,970.40 : x
  2. Step 2: Convert to fraction form
    842,139.20/1,263,208.80 = 486,970.40/x
  3. Step 3: Cross multiply
    842,139.20x = 1,263,208.80 × 486,970.40
  4. Step 4: Simplify right side
    842,139.20x = 615,145,294,619.52
  5. Step 5: Solve for x
    x = 615,145,294,619.52/842,139.20
  6. Step 6: Final answer
    x = 730,455.60

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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.