Home / 808,139.20-1,212,208.80-358,859.20

Finding the Fourth Proportional to 808,139.20, 1,212,208.80 and 358,859.20

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Solution

The fourth proportional to 808,139.20, 1,212,208.80 and 358,859.20 is: 538,288.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,139.20 : 1,212,208.80 = 358,859.20 : x
  2. Step 2: Convert to fraction form
    808,139.20/1,212,208.80 = 358,859.20/x
  3. Step 3: Cross multiply
    808,139.20x = 1,212,208.80 × 358,859.20
  4. Step 4: Simplify right side
    808,139.20x = 435,012,280,200.96
  5. Step 5: Solve for x
    x = 435,012,280,200.96/808,139.20
  6. Step 6: Final answer
    x = 538,288.80

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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.