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Finding the Fourth Proportional to 312,279.76, 430,920.96 and 176,346.77

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Solution

The fourth proportional to 312,279.76, 430,920.96 and 176,346.77 is: 243,344.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,279.76 : 430,920.96 = 176,346.77 : x
  2. Step 2: Convert to fraction form
    312,279.76/430,920.96 = 176,346.77/x
  3. Step 3: Cross multiply
    312,279.76x = 430,920.96 × 176,346.77
  4. Step 4: Simplify right side
    312,279.76x = 75,991,519,421.30
  5. Step 5: Solve for x
    x = 75,991,519,421.30/312,279.76
  6. Step 6: Final answer
    x = 243,344.37

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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.