Home / 686,006.40-1,029,009.60-647,515.20

Finding the Fourth Proportional to 686,006.40, 1,029,009.60 and 647,515.20

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Solution

The fourth proportional to 686,006.40, 1,029,009.60 and 647,515.20 is: 971,272.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,006.40 : 1,029,009.60 = 647,515.20 : x
  2. Step 2: Convert to fraction form
    686,006.40/1,029,009.60 = 647,515.20/x
  3. Step 3: Cross multiply
    686,006.40x = 1,029,009.60 × 647,515.20
  4. Step 4: Simplify right side
    686,006.40x = 666,299,356,945.92
  5. Step 5: Solve for x
    x = 666,299,356,945.92/686,006.40
  6. Step 6: Final answer
    x = 971,272.80

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Similar ratio
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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.