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Finding the Fourth Proportional to 493,582.66, 680,485.39 and 391,944.57

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Solution

The fourth proportional to 493,582.66, 680,485.39 and 391,944.57 is: 540,360.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,582.66 : 680,485.39 = 391,944.57 : x
  2. Step 2: Convert to fraction form
    493,582.66/680,485.39 = 391,944.57/x
  3. Step 3: Cross multiply
    493,582.66x = 680,485.39 × 391,944.57
  4. Step 4: Simplify right side
    493,582.66x = 266,712,555,524.41
  5. Step 5: Solve for x
    x = 266,712,555,524.41/493,582.66
  6. Step 6: Final answer
    x = 540,360.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.