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Finding the Fourth Proportional to 470,215.19, 648,909.83 and 276,636.53

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Solution

The fourth proportional to 470,215.19, 648,909.83 and 276,636.53 is: 381,765.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    470,215.19 : 648,909.83 = 276,636.53 : x
  2. Step 2: Convert to fraction form
    470,215.19/648,909.83 = 276,636.53/x
  3. Step 3: Cross multiply
    470,215.19x = 648,909.83 × 276,636.53
  4. Step 4: Simplify right side
    470,215.19x = 179,512,165,967.96
  5. Step 5: Solve for x
    x = 179,512,165,967.96/470,215.19
  6. Step 6: Final answer
    x = 381,765.98

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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.