Home / 645,004.96-890,084.42-415,571.91

Finding the Fourth Proportional to 645,004.96, 890,084.42 and 415,571.91

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Solution

The fourth proportional to 645,004.96, 890,084.42 and 415,571.91 is: 573,474.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,004.96 : 890,084.42 = 415,571.91 : x
  2. Step 2: Convert to fraction form
    645,004.96/890,084.42 = 415,571.91/x
  3. Step 3: Cross multiply
    645,004.96x = 890,084.42 × 415,571.91
  4. Step 4: Simplify right side
    645,004.96x = 369,894,082,480.64
  5. Step 5: Solve for x
    x = 369,894,082,480.64/645,004.96
  6. Step 6: Final answer
    x = 573,474.79

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1.5x scale

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.