Home / 859,426.40-1,289,139.60-486,178.40

Finding the Fourth Proportional to 859,426.40, 1,289,139.60 and 486,178.40

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Solution

The fourth proportional to 859,426.40, 1,289,139.60 and 486,178.40 is: 729,267.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,426.40 : 1,289,139.60 = 486,178.40 : x
  2. Step 2: Convert to fraction form
    859,426.40/1,289,139.60 = 486,178.40/x
  3. Step 3: Cross multiply
    859,426.40x = 1,289,139.60 × 486,178.40
  4. Step 4: Simplify right side
    859,426.40x = 626,751,828,104.64
  5. Step 5: Solve for x
    x = 626,751,828,104.64/859,426.40
  6. Step 6: Final answer
    x = 729,267.60

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Double scale
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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.