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Finding the Fourth Proportional to 349,769.80, 524,870.70 and 139,385.80

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Solution

The fourth proportional to 349,769.80, 524,870.70 and 139,385.80 is: 209,164.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    349,769.80 : 524,870.70 = 139,385.80 : x
  2. Step 2: Convert to fraction form
    349,769.80/524,870.70 = 139,385.80/x
  3. Step 3: Cross multiply
    349,769.80x = 524,870.70 × 139,385.80
  4. Step 4: Simplify right side
    349,769.80x = 73,159,522,416.06
  5. Step 5: Solve for x
    x = 73,159,522,416.06/349,769.80
  6. Step 6: Final answer
    x = 209,164.78

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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.