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Finding the Fourth Proportional to 391,411.80, 540,313.58 and 264,259.64

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Solution

The fourth proportional to 391,411.80, 540,313.58 and 264,259.64 is: 364,789.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,411.80 : 540,313.58 = 264,259.64 : x
  2. Step 2: Convert to fraction form
    391,411.80/540,313.58 = 264,259.64/x
  3. Step 3: Cross multiply
    391,411.80x = 540,313.58 × 264,259.64
  4. Step 4: Simplify right side
    391,411.80x = 142,783,072,137.91
  5. Step 5: Solve for x
    x = 142,783,072,137.91/391,411.80
  6. Step 6: Final answer
    x = 364,789.90

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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.