Home / 1,288,218.60-1,932,327.90-815,437.80

Finding the Fourth Proportional to 1,288,218.60, 1,932,327.90 and 815,437.80

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Solution

The fourth proportional to 1,288,218.60, 1,932,327.90 and 815,437.80 is: 1,223,156.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,218.60 : 1,932,327.90 = 815,437.80 : x
  2. Step 2: Convert to fraction form
    1,288,218.60/1,932,327.90 = 815,437.80/x
  3. Step 3: Cross multiply
    1,288,218.60x = 1,932,327.90 × 815,437.80
  4. Step 4: Simplify right side
    1,288,218.60x = 1,575,693,211,654.62
  5. Step 5: Solve for x
    x = 1,575,693,211,654.62/1,288,218.60
  6. Step 6: Final answer
    x = 1,223,156.70

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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.