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Finding the Fourth Proportional to 641,742.80, 885,615.56 and 351,349.49

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Solution

The fourth proportional to 641,742.80, 885,615.56 and 351,349.49 is: 484,868.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,742.80 : 885,615.56 = 351,349.49 : x
  2. Step 2: Convert to fraction form
    641,742.80/885,615.56 = 351,349.49/x
  3. Step 3: Cross multiply
    641,742.80x = 885,615.56 × 351,349.49
  4. Step 4: Simplify right side
    641,742.80x = 311,160,577,116.92
  5. Step 5: Solve for x
    x = 311,160,577,116.92/641,742.80
  6. Step 6: Final answer
    x = 484,868.05

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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.