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Finding the Fourth Proportional to 520,211.08, 780,368.54 and 141,137.76

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Solution

The fourth proportional to 520,211.08, 780,368.54 and 141,137.76 is: 211,720.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,211.08 : 780,368.54 = 141,137.76 : x
  2. Step 2: Convert to fraction form
    520,211.08/780,368.54 = 141,137.76/x
  3. Step 3: Cross multiply
    520,211.08x = 780,368.54 × 141,137.76
  4. Step 4: Simplify right side
    520,211.08x = 110,139,467,710.07
  5. Step 5: Solve for x
    x = 110,139,467,710.07/520,211.08
  6. Step 6: Final answer
    x = 211,720.73

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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.