Home / 805,407.20-1,208,110.80-539,986.40

Finding the Fourth Proportional to 805,407.20, 1,208,110.80 and 539,986.40

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Solution

The fourth proportional to 805,407.20, 1,208,110.80 and 539,986.40 is: 809,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,407.20 : 1,208,110.80 = 539,986.40 : x
  2. Step 2: Convert to fraction form
    805,407.20/1,208,110.80 = 539,986.40/x
  3. Step 3: Cross multiply
    805,407.20x = 1,208,110.80 × 539,986.40
  4. Step 4: Simplify right side
    805,407.20x = 652,363,401,693.12
  5. Step 5: Solve for x
    x = 652,363,401,693.12/805,407.20
  6. Step 6: Final answer
    x = 809,979.60

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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.