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Finding the Fourth Proportional to 261,665.80, 391,980.30 and 243,003.40

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Solution

The fourth proportional to 261,665.80, 391,980.30 and 243,003.40 is: 364,023.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,665.80 : 391,980.30 = 243,003.40 : x
  2. Step 2: Convert to fraction form
    261,665.80/391,980.30 = 243,003.40/x
  3. Step 3: Cross multiply
    261,665.80x = 391,980.30 × 243,003.40
  4. Step 4: Simplify right side
    261,665.80x = 95,252,545,633.02
  5. Step 5: Solve for x
    x = 95,252,545,633.02/261,665.80
  6. Step 6: Final answer
    x = 364,023.67

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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.