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Finding the Fourth Proportional to 520,288.80, 780,433.20 and 492,732.60

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Solution

The fourth proportional to 520,288.80, 780,433.20 and 492,732.60 is: 739,098.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,288.80 : 780,433.20 = 492,732.60 : x
  2. Step 2: Convert to fraction form
    520,288.80/780,433.20 = 492,732.60/x
  3. Step 3: Cross multiply
    520,288.80x = 780,433.20 × 492,732.60
  4. Step 4: Simplify right side
    520,288.80x = 384,544,879,762.32
  5. Step 5: Solve for x
    x = 384,544,879,762.32/520,288.80
  6. Step 6: Final answer
    x = 739,098.90

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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.