Home / 1,216,778.47-1,679,123.44-672,899.78

Finding the Fourth Proportional to 1,216,778.47, 1,679,123.44 and 672,899.78

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Solution

The fourth proportional to 1,216,778.47, 1,679,123.44 and 672,899.78 is: 928,584.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,778.47 : 1,679,123.44 = 672,899.78 : x
  2. Step 2: Convert to fraction form
    1,216,778.47/1,679,123.44 = 672,899.78/x
  3. Step 3: Cross multiply
    1,216,778.47x = 1,679,123.44 × 672,899.78
  4. Step 4: Simplify right side
    1,216,778.47x = 1,129,881,793,368.84
  5. Step 5: Solve for x
    x = 1,129,881,793,368.84/1,216,778.47
  6. Step 6: Final answer
    x = 928,584.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.