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Finding the Fourth Proportional to 459,230.79, 688,848.38 and 139,385.44

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Solution

The fourth proportional to 459,230.79, 688,848.38 and 139,385.44 is: 209,078.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,230.79 : 688,848.38 = 139,385.44 : x
  2. Step 2: Convert to fraction form
    459,230.79/688,848.38 = 139,385.44/x
  3. Step 3: Cross multiply
    459,230.79x = 688,848.38 × 139,385.44
  4. Step 4: Simplify right side
    459,230.79x = 96,015,432,135.69
  5. Step 5: Solve for x
    x = 96,015,432,135.69/459,230.79
  6. Step 6: Final answer
    x = 209,078.82

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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.