Home / 519,936.60-779,904.90-431,290.20

Finding the Fourth Proportional to 519,936.60, 779,904.90 and 431,290.20

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Solution

The fourth proportional to 519,936.60, 779,904.90 and 431,290.20 is: 646,935.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,936.60 : 779,904.90 = 431,290.20 : x
  2. Step 2: Convert to fraction form
    519,936.60/779,904.90 = 431,290.20/x
  3. Step 3: Cross multiply
    519,936.60x = 779,904.90 × 431,290.20
  4. Step 4: Simplify right side
    519,936.60x = 336,365,340,301.98
  5. Step 5: Solve for x
    x = 336,365,340,301.98/519,936.60
  6. Step 6: Final answer
    x = 646,935.30

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Half scale
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Double scale
Find fourth proportional to 519,937.60, 779,906.40 and 431,291.20
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.