Home / 728,587.45-1,092,972.84-391,164.40

Finding the Fourth Proportional to 728,587.45, 1,092,972.84 and 391,164.40

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Solution

The fourth proportional to 728,587.45, 1,092,972.84 and 391,164.40 is: 586,795.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,587.45 : 1,092,972.84 = 391,164.40 : x
  2. Step 2: Convert to fraction form
    728,587.45/1,092,972.84 = 391,164.40/x
  3. Step 3: Cross multiply
    728,587.45x = 1,092,972.84 × 391,164.40
  4. Step 4: Simplify right side
    728,587.45x = 427,532,065,174.90
  5. Step 5: Solve for x
    x = 427,532,065,174.90/728,587.45
  6. Step 6: Final answer
    x = 586,795.81

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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.