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Finding the Fourth Proportional to 851,806.40, 1,277,248.80 and 353,220.80

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Solution

The fourth proportional to 851,806.40, 1,277,248.80 and 353,220.80 is: 529,640.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,806.40 : 1,277,248.80 = 353,220.80 : x
  2. Step 2: Convert to fraction form
    851,806.40/1,277,248.80 = 353,220.80/x
  3. Step 3: Cross multiply
    851,806.40x = 1,277,248.80 × 353,220.80
  4. Step 4: Simplify right side
    851,806.40x = 451,150,842,935.04
  5. Step 5: Solve for x
    x = 451,150,842,935.04/851,806.40
  6. Step 6: Final answer
    x = 529,640.12

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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.