Home / 645,613.27-890,953.09-355,228.61

Finding the Fourth Proportional to 645,613.27, 890,953.09 and 355,228.61

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Solution

The fourth proportional to 645,613.27, 890,953.09 and 355,228.61 is: 490,219.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,613.27 : 890,953.09 = 355,228.61 : x
  2. Step 2: Convert to fraction form
    645,613.27/890,953.09 = 355,228.61/x
  3. Step 3: Cross multiply
    645,613.27x = 890,953.09 × 355,228.61
  4. Step 4: Simplify right side
    645,613.27x = 316,492,022,393.07
  5. Step 5: Solve for x
    x = 316,492,022,393.07/645,613.27
  6. Step 6: Final answer
    x = 490,219.20

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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.