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Finding the Fourth Proportional to 349,620.30, 524,430.45 and 139,149.90

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Solution

The fourth proportional to 349,620.30, 524,430.45 and 139,149.90 is: 208,724.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    349,620.30 : 524,430.45 = 139,149.90 : x
  2. Step 2: Convert to fraction form
    349,620.30/524,430.45 = 139,149.90/x
  3. Step 3: Cross multiply
    349,620.30x = 524,430.45 × 139,149.90
  4. Step 4: Simplify right side
    349,620.30x = 72,974,444,674.46
  5. Step 5: Solve for x
    x = 72,974,444,674.46/349,620.30
  6. Step 6: Final answer
    x = 208,724.85

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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.