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Finding the Fourth Proportional to 808,672.80, 1,213,009.20 and 684,256.80

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Solution

The fourth proportional to 808,672.80, 1,213,009.20 and 684,256.80 is: 1,026,385.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,672.80 : 1,213,009.20 = 684,256.80 : x
  2. Step 2: Convert to fraction form
    808,672.80/1,213,009.20 = 684,256.80/x
  3. Step 3: Cross multiply
    808,672.80x = 1,213,009.20 × 684,256.80
  4. Step 4: Simplify right side
    808,672.80x = 830,009,793,562.56
  5. Step 5: Solve for x
    x = 830,009,793,562.56/808,672.80
  6. Step 6: Final answer
    x = 1,026,385.20

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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.