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Finding the Fourth Proportional to 520,003.44, 780,005.16 and 187,579.44

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Solution

The fourth proportional to 520,003.44, 780,005.16 and 187,579.44 is: 281,369.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,003.44 : 780,005.16 = 187,579.44 : x
  2. Step 2: Convert to fraction form
    520,003.44/780,005.16 = 187,579.44/x
  3. Step 3: Cross multiply
    520,003.44x = 780,005.16 × 187,579.44
  4. Step 4: Simplify right side
    520,003.44x = 146,312,931,109.91
  5. Step 5: Solve for x
    x = 146,312,931,109.91/520,003.44
  6. Step 6: Final answer
    x = 281,369.16

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Similar ratio
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1.5x scale

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.