Home / 690,690.82-1,036,146.95-291,390.41

Finding the Fourth Proportional to 690,690.82, 1,036,146.95 and 291,390.41

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Solution

The fourth proportional to 690,690.82, 1,036,146.95 and 291,390.41 is: 437,132.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,690.82 : 1,036,146.95 = 291,390.41 : x
  2. Step 2: Convert to fraction form
    690,690.82/1,036,146.95 = 291,390.41/x
  3. Step 3: Cross multiply
    690,690.82x = 1,036,146.95 × 291,390.41
  4. Step 4: Simplify right side
    690,690.82x = 301,923,287,216.66
  5. Step 5: Solve for x
    x = 301,923,287,216.66/690,690.82
  6. Step 6: Final answer
    x = 437,132.33

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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.