Home / 725,135.40-1,087,703.10-389,212.20

Finding the Fourth Proportional to 725,135.40, 1,087,703.10 and 389,212.20

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Solution

The fourth proportional to 725,135.40, 1,087,703.10 and 389,212.20 is: 583,818.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,135.40 : 1,087,703.10 = 389,212.20 : x
  2. Step 2: Convert to fraction form
    725,135.40/1,087,703.10 = 389,212.20/x
  3. Step 3: Cross multiply
    725,135.40x = 1,087,703.10 × 389,212.20
  4. Step 4: Simplify right side
    725,135.40x = 423,347,316,497.82
  5. Step 5: Solve for x
    x = 423,347,316,497.82/725,135.40
  6. Step 6: Final answer
    x = 583,818.30

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Double scale
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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.