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Finding the Fourth Proportional to 555,856.48, 766,980.84 and 310,845.76

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Solution

The fourth proportional to 555,856.48, 766,980.84 and 310,845.76 is: 428,910.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,856.48 : 766,980.84 = 310,845.76 : x
  2. Step 2: Convert to fraction form
    555,856.48/766,980.84 = 310,845.76/x
  3. Step 3: Cross multiply
    555,856.48x = 766,980.84 × 310,845.76
  4. Step 4: Simplify right side
    555,856.48x = 238,412,742,115.24
  5. Step 5: Solve for x
    x = 238,412,742,115.24/555,856.48
  6. Step 6: Final answer
    x = 428,910.61

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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.