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Finding the Fourth Proportional to 528,409.60, 729,189.12 and 377,758.72

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Solution

The fourth proportional to 528,409.60, 729,189.12 and 377,758.72 is: 521,295.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,409.60 : 729,189.12 = 377,758.72 : x
  2. Step 2: Convert to fraction form
    528,409.60/729,189.12 = 377,758.72/x
  3. Step 3: Cross multiply
    528,409.60x = 729,189.12 × 377,758.72
  4. Step 4: Simplify right side
    528,409.60x = 275,457,548,609.13
  5. Step 5: Solve for x
    x = 275,457,548,609.13/528,409.60
  6. Step 6: Final answer
    x = 521,295.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.