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Finding the Fourth Proportional to 858,809.20, 1,288,213.80 and 606,866.80

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Solution

The fourth proportional to 858,809.20, 1,288,213.80 and 606,866.80 is: 910,300.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,809.20 : 1,288,213.80 = 606,866.80 : x
  2. Step 2: Convert to fraction form
    858,809.20/1,288,213.80 = 606,866.80/x
  3. Step 3: Cross multiply
    858,809.20x = 1,288,213.80 × 606,866.80
  4. Step 4: Simplify right side
    858,809.20x = 781,774,186,521.84
  5. Step 5: Solve for x
    x = 781,774,186,521.84/858,809.20
  6. Step 6: Final answer
    x = 910,300.20

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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.