Home / 689,615.34-951,654.27-399,239.21

Finding the Fourth Proportional to 689,615.34, 951,654.27 and 399,239.21

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Solution

The fourth proportional to 689,615.34, 951,654.27 and 399,239.21 is: 550,941.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,615.34 : 951,654.27 = 399,239.21 : x
  2. Step 2: Convert to fraction form
    689,615.34/951,654.27 = 399,239.21/x
  3. Step 3: Cross multiply
    689,615.34x = 951,654.27 × 399,239.21
  4. Step 4: Simplify right side
    689,615.34x = 379,937,698,947.93
  5. Step 5: Solve for x
    x = 379,937,698,947.93/689,615.34
  6. Step 6: Final answer
    x = 550,941.48

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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.