Home / 645,515.63-890,799.17-355,110.23

Finding the Fourth Proportional to 645,515.63, 890,799.17 and 355,110.23

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Solution

The fourth proportional to 645,515.63, 890,799.17 and 355,110.23 is: 490,045.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,515.63 : 890,799.17 = 355,110.23 : x
  2. Step 2: Convert to fraction form
    645,515.63/890,799.17 = 355,110.23/x
  3. Step 3: Cross multiply
    645,515.63x = 890,799.17 × 355,110.23
  4. Step 4: Simplify right side
    645,515.63x = 316,331,891,912.96
  5. Step 5: Solve for x
    x = 316,331,891,912.96/645,515.63
  6. Step 6: Final answer
    x = 490,045.28

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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.