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Finding the Fourth Proportional to 692,869.68, 1,039,392 and 219,385.80

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Solution

The fourth proportional to 692,869.68, 1,039,392 and 219,385.80 is: 329,106.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,869.68 : 1,039,392 = 219,385.80 : x
  2. Step 2: Convert to fraction form
    692,869.68/1,039,392 = 219,385.80/x
  3. Step 3: Cross multiply
    692,869.68x = 1,039,392 × 219,385.80
  4. Step 4: Simplify right side
    692,869.68x = 228,027,845,433.60
  5. Step 5: Solve for x
    x = 228,027,845,433.60/692,869.68
  6. Step 6: Final answer
    x = 329,106.40

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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.