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Finding the Fourth Proportional to 519,485.40, 779,228.10 and 498,490.20

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Solution

The fourth proportional to 519,485.40, 779,228.10 and 498,490.20 is: 747,735.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,485.40 : 779,228.10 = 498,490.20 : x
  2. Step 2: Convert to fraction form
    519,485.40/779,228.10 = 498,490.20/x
  3. Step 3: Cross multiply
    519,485.40x = 779,228.10 × 498,490.20
  4. Step 4: Simplify right side
    519,485.40x = 388,437,571,414.62
  5. Step 5: Solve for x
    x = 388,437,571,414.62/519,485.40
  6. Step 6: Final answer
    x = 747,735.30

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Half scale
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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.