Home / 856,153.58-1,283,301.81-428,658.42

Finding the Fourth Proportional to 856,153.58, 1,283,301.81 and 428,658.42

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Solution

The fourth proportional to 856,153.58, 1,283,301.81 and 428,658.42 is: 642,522.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,153.58 : 1,283,301.81 = 428,658.42 : x
  2. Step 2: Convert to fraction form
    856,153.58/1,283,301.81 = 428,658.42/x
  3. Step 3: Cross multiply
    856,153.58x = 1,283,301.81 × 428,658.42
  4. Step 4: Simplify right side
    856,153.58x = 550,098,126,257.74
  5. Step 5: Solve for x
    x = 550,098,126,257.74/856,153.58
  6. Step 6: Final answer
    x = 642,522.72

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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.