Home / 851,619.20-1,277,428.80-782,806.40

Finding the Fourth Proportional to 851,619.20, 1,277,428.80 and 782,806.40

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Solution

The fourth proportional to 851,619.20, 1,277,428.80 and 782,806.40 is: 1,174,209.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,619.20 : 1,277,428.80 = 782,806.40 : x
  2. Step 2: Convert to fraction form
    851,619.20/1,277,428.80 = 782,806.40/x
  3. Step 3: Cross multiply
    851,619.20x = 1,277,428.80 × 782,806.40
  4. Step 4: Simplify right side
    851,619.20x = 999,979,440,184.32
  5. Step 5: Solve for x
    x = 999,979,440,184.32/851,619.20
  6. Step 6: Final answer
    x = 1,174,209.60

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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.