Home / 645,446.23-890,697.88-351,086.21

Finding the Fourth Proportional to 645,446.23, 890,697.88 and 351,086.21

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Solution

The fourth proportional to 645,446.23, 890,697.88 and 351,086.21 is: 484,489.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,446.23 : 890,697.88 = 351,086.21 : x
  2. Step 2: Convert to fraction form
    645,446.23/890,697.88 = 351,086.21/x
  3. Step 3: Cross multiply
    645,446.23x = 890,697.88 × 351,086.21
  4. Step 4: Simplify right side
    645,446.23x = 312,711,738,929.60
  5. Step 5: Solve for x
    x = 312,711,738,929.60/645,446.23
  6. Step 6: Final answer
    x = 484,489.22

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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.