Home / 690,664.98-1,036,145.70-391,288.98

Finding the Fourth Proportional to 690,664.98, 1,036,145.70 and 391,288.98

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Solution

The fourth proportional to 690,664.98, 1,036,145.70 and 391,288.98 is: 587,017.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,664.98 : 1,036,145.70 = 391,288.98 : x
  2. Step 2: Convert to fraction form
    690,664.98/1,036,145.70 = 391,288.98/x
  3. Step 3: Cross multiply
    690,664.98x = 1,036,145.70 × 391,288.98
  4. Step 4: Simplify right side
    690,664.98x = 405,432,394,084.39
  5. Step 5: Solve for x
    x = 405,432,394,084.39/690,664.98
  6. Step 6: Final answer
    x = 587,017.45

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1.5x scale

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.