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Finding the Fourth Proportional to 520,621.56, 780,041.12 and 284,130.32

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Solution

The fourth proportional to 520,621.56, 780,041.12 and 284,130.32 is: 425,709.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,621.56 : 780,041.12 = 284,130.32 : x
  2. Step 2: Convert to fraction form
    520,621.56/780,041.12 = 284,130.32/x
  3. Step 3: Cross multiply
    520,621.56x = 780,041.12 × 284,130.32
  4. Step 4: Simplify right side
    520,621.56x = 221,633,327,717.90
  5. Step 5: Solve for x
    x = 221,633,327,717.90/520,621.56
  6. Step 6: Final answer
    x = 425,709.08

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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.