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Finding the Fourth Proportional to 520,199.70, 780,299.55 and 495,705.30

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Solution

The fourth proportional to 520,199.70, 780,299.55 and 495,705.30 is: 743,557.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,199.70 : 780,299.55 = 495,705.30 : x
  2. Step 2: Convert to fraction form
    520,199.70/780,299.55 = 495,705.30/x
  3. Step 3: Cross multiply
    520,199.70x = 780,299.55 × 495,705.30
  4. Step 4: Simplify right side
    520,199.70x = 386,798,622,522.62
  5. Step 5: Solve for x
    x = 386,798,622,522.62/520,199.70
  6. Step 6: Final answer
    x = 743,557.95

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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.