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Finding the Fourth Proportional to 391,710.38, 540,725.66 and 264,558.20

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Solution

The fourth proportional to 391,710.38, 540,725.66 and 264,558.20 is: 365,201.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,710.38 : 540,725.66 = 264,558.20 : x
  2. Step 2: Convert to fraction form
    391,710.38/540,725.66 = 264,558.20/x
  3. Step 3: Cross multiply
    391,710.38x = 540,725.66 × 264,558.20
  4. Step 4: Simplify right side
    391,710.38x = 143,053,407,303.41
  5. Step 5: Solve for x
    x = 143,053,407,303.41/391,710.38
  6. Step 6: Final answer
    x = 365,201.98

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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.