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Finding the Fourth Proportional to 519,460.40, 779,190.60 and 498,465.20

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Solution

The fourth proportional to 519,460.40, 779,190.60 and 498,465.20 is: 747,697.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,460.40 : 779,190.60 = 498,465.20 : x
  2. Step 2: Convert to fraction form
    519,460.40/779,190.60 = 498,465.20/x
  3. Step 3: Cross multiply
    519,460.40x = 779,190.60 × 498,465.20
  4. Step 4: Simplify right side
    519,460.40x = 388,399,398,267.12
  5. Step 5: Solve for x
    x = 388,399,398,267.12/519,460.40
  6. Step 6: Final answer
    x = 747,697.80

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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.