Home / 645,439.32-890,771.58-369,833.67

Finding the Fourth Proportional to 645,439.32, 890,771.58 and 369,833.67

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Solution

The fourth proportional to 645,439.32, 890,771.58 and 369,833.67 is: 510,407.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,439.32 : 890,771.58 = 369,833.67 : x
  2. Step 2: Convert to fraction form
    645,439.32/890,771.58 = 369,833.67/x
  3. Step 3: Cross multiply
    645,439.32x = 890,771.58 × 369,833.67
  4. Step 4: Simplify right side
    645,439.32x = 329,437,322,563.10
  5. Step 5: Solve for x
    x = 329,437,322,563.10/645,439.32
  6. Step 6: Final answer
    x = 510,407.89

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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.