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Finding the Fourth Proportional to 456,108.70, 684,308.85 and 156,781.30

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Solution

The fourth proportional to 456,108.70, 684,308.85 and 156,781.30 is: 235,222.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,108.70 : 684,308.85 = 156,781.30 : x
  2. Step 2: Convert to fraction form
    456,108.70/684,308.85 = 156,781.30/x
  3. Step 3: Cross multiply
    456,108.70x = 684,308.85 × 156,781.30
  4. Step 4: Simplify right side
    456,108.70x = 107,286,831,104.51
  5. Step 5: Solve for x
    x = 107,286,831,104.51/456,108.70
  6. Step 6: Final answer
    x = 235,222.07

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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.