Home / 725,415.80-1,088,123.70-513,908.60

Finding the Fourth Proportional to 725,415.80, 1,088,123.70 and 513,908.60

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Solution

The fourth proportional to 725,415.80, 1,088,123.70 and 513,908.60 is: 770,862.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,415.80 : 1,088,123.70 = 513,908.60 : x
  2. Step 2: Convert to fraction form
    725,415.80/1,088,123.70 = 513,908.60/x
  3. Step 3: Cross multiply
    725,415.80x = 1,088,123.70 × 513,908.60
  4. Step 4: Simplify right side
    725,415.80x = 559,196,127,293.82
  5. Step 5: Solve for x
    x = 559,196,127,293.82/725,415.80
  6. Step 6: Final answer
    x = 770,862.90

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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.