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Finding the Fourth Proportional to 391,709.38, 540,724.28 and 264,557.20

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Solution

The fourth proportional to 391,709.38, 540,724.28 and 264,557.20 is: 365,200.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,709.38 : 540,724.28 = 264,557.20 : x
  2. Step 2: Convert to fraction form
    391,709.38/540,724.28 = 264,557.20/x
  3. Step 3: Cross multiply
    391,709.38x = 540,724.28 × 264,557.20
  4. Step 4: Simplify right side
    391,709.38x = 143,052,501,488.82
  5. Step 5: Solve for x
    x = 143,052,501,488.82/391,709.38
  6. Step 6: Final answer
    x = 365,200.60

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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.