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Finding the Fourth Proportional to 689,729.70, 951,287.76 and 448,090.11

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Solution

The fourth proportional to 689,729.70, 951,287.76 and 448,090.11 is: 618,014.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,729.70 : 951,287.76 = 448,090.11 : x
  2. Step 2: Convert to fraction form
    689,729.70/951,287.76 = 448,090.11/x
  3. Step 3: Cross multiply
    689,729.70x = 951,287.76 × 448,090.11
  4. Step 4: Simplify right side
    689,729.70x = 426,262,637,020.05
  5. Step 5: Solve for x
    x = 426,262,637,020.05/689,729.70
  6. Step 6: Final answer
    x = 618,014.04

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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.