Home / 689,112.40-1,031,627.40-512,402.80

Finding the Fourth Proportional to 689,112.40, 1,031,627.40 and 512,402.80

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Solution

The fourth proportional to 689,112.40, 1,031,627.40 and 512,402.80 is: 767,086.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,112.40 : 1,031,627.40 = 512,402.80 : x
  2. Step 2: Convert to fraction form
    689,112.40/1,031,627.40 = 512,402.80/x
  3. Step 3: Cross multiply
    689,112.40x = 1,031,627.40 × 512,402.80
  4. Step 4: Simplify right side
    689,112.40x = 528,608,768,316.72
  5. Step 5: Solve for x
    x = 528,608,768,316.72/689,112.40
  6. Step 6: Final answer
    x = 767,086.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.