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Finding the Fourth Proportional to 578,509.64, 866,269.20 and 399,148.10

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Solution

The fourth proportional to 578,509.64, 866,269.20 and 399,148.10 is: 597,690.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,509.64 : 866,269.20 = 399,148.10 : x
  2. Step 2: Convert to fraction form
    578,509.64/866,269.20 = 399,148.10/x
  3. Step 3: Cross multiply
    578,509.64x = 866,269.20 × 399,148.10
  4. Step 4: Simplify right side
    578,509.64x = 345,769,705,268.52
  5. Step 5: Solve for x
    x = 345,769,705,268.52/578,509.64
  6. Step 6: Final answer
    x = 597,690.48

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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.