Home / 690,890.55-1,036,918.11-291,817.72

Finding the Fourth Proportional to 690,890.55, 1,036,918.11 and 291,817.72

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Solution

The fourth proportional to 690,890.55, 1,036,918.11 and 291,817.72 is: 437,972.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,890.55 : 1,036,918.11 = 291,817.72 : x
  2. Step 2: Convert to fraction form
    690,890.55/1,036,918.11 = 291,817.72/x
  3. Step 3: Cross multiply
    690,890.55x = 1,036,918.11 × 291,817.72
  4. Step 4: Simplify right side
    690,890.55x = 302,591,079,435.90
  5. Step 5: Solve for x
    x = 302,591,079,435.90/690,890.55
  6. Step 6: Final answer
    x = 437,972.53

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Double scale
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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.