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Finding the Fourth Proportional to 356,579.44, 534,870 and 90,340

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Solution

The fourth proportional to 356,579.44, 534,870 and 90,340 is: 135,510.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,579.44 : 534,870 = 90,340 : x
  2. Step 2: Convert to fraction form
    356,579.44/534,870 = 90,340/x
  3. Step 3: Cross multiply
    356,579.44x = 534,870 × 90,340
  4. Step 4: Simplify right side
    356,579.44x = 48,320,155,800
  5. Step 5: Solve for x
    x = 48,320,155,800/356,579.44
  6. Step 6: Final answer
    x = 135,510.21

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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.