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Finding the Fourth Proportional to 356,437.80, 534,755.79 and 289,712.70

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Solution

The fourth proportional to 356,437.80, 534,755.79 and 289,712.70 is: 434,649.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,437.80 : 534,755.79 = 289,712.70 : x
  2. Step 2: Convert to fraction form
    356,437.80/534,755.79 = 289,712.70/x
  3. Step 3: Cross multiply
    356,437.80x = 534,755.79 × 289,712.70
  4. Step 4: Simplify right side
    356,437.80x = 154,925,543,761.53
  5. Step 5: Solve for x
    x = 154,925,543,761.53/356,437.80
  6. Step 6: Final answer
    x = 434,649.59

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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.