Home / 645,189.60-890,360.35-369,636.70

Finding the Fourth Proportional to 645,189.60, 890,360.35 and 369,636.70

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Solution

The fourth proportional to 645,189.60, 890,360.35 and 369,636.70 is: 510,097.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,189.60 : 890,360.35 = 369,636.70 : x
  2. Step 2: Convert to fraction form
    645,189.60/890,360.35 = 369,636.70/x
  3. Step 3: Cross multiply
    645,189.60x = 890,360.35 × 369,636.70
  4. Step 4: Simplify right side
    645,189.60x = 329,109,861,584.85
  5. Step 5: Solve for x
    x = 329,109,861,584.85/645,189.60
  6. Step 6: Final answer
    x = 510,097.90

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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.