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Finding the Fourth Proportional to 519,763.20, 779,644.80 and 360,330.90

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Solution

The fourth proportional to 519,763.20, 779,644.80 and 360,330.90 is: 540,496.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,763.20 : 779,644.80 = 360,330.90 : x
  2. Step 2: Convert to fraction form
    519,763.20/779,644.80 = 360,330.90/x
  3. Step 3: Cross multiply
    519,763.20x = 779,644.80 × 360,330.90
  4. Step 4: Simplify right side
    519,763.20x = 280,930,112,464.32
  5. Step 5: Solve for x
    x = 280,930,112,464.32/519,763.20
  6. Step 6: Final answer
    x = 540,496.35

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Double scale
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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.