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Finding the Fourth Proportional to 418,621.56, 579,219 and 365,018.28

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Solution

The fourth proportional to 418,621.56, 579,219 and 365,018.28 is: 505,051.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,621.56 : 579,219 = 365,018.28 : x
  2. Step 2: Convert to fraction form
    418,621.56/579,219 = 365,018.28/x
  3. Step 3: Cross multiply
    418,621.56x = 579,219 × 365,018.28
  4. Step 4: Simplify right side
    418,621.56x = 211,425,523,123.32
  5. Step 5: Solve for x
    x = 211,425,523,123.32/418,621.56
  6. Step 6: Final answer
    x = 505,051.68

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1.5x scale

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.