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Finding the Fourth Proportional to 689,646.32, 951,696.99 and 399,270.13

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Solution

The fourth proportional to 689,646.32, 951,696.99 and 399,270.13 is: 550,984.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,646.32 : 951,696.99 = 399,270.13 : x
  2. Step 2: Convert to fraction form
    689,646.32/951,696.99 = 399,270.13/x
  3. Step 3: Cross multiply
    689,646.32x = 951,696.99 × 399,270.13
  4. Step 4: Simplify right side
    689,646.32x = 379,984,180,917.91
  5. Step 5: Solve for x
    x = 379,984,180,917.91/689,646.32
  6. Step 6: Final answer
    x = 550,984.13

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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.