Home / 1,320,001.70-1,980,002.55-788,123.30

Finding the Fourth Proportional to 1,320,001.70, 1,980,002.55 and 788,123.30

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Solution

The fourth proportional to 1,320,001.70, 1,980,002.55 and 788,123.30 is: 1,182,184.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,001.70 : 1,980,002.55 = 788,123.30 : x
  2. Step 2: Convert to fraction form
    1,320,001.70/1,980,002.55 = 788,123.30/x
  3. Step 3: Cross multiply
    1,320,001.70x = 1,980,002.55 × 788,123.30
  4. Step 4: Simplify right side
    1,320,001.70x = 1,560,486,143,714.42
  5. Step 5: Solve for x
    x = 1,560,486,143,714.42/1,320,001.70
  6. Step 6: Final answer
    x = 1,182,184.95

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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.