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Finding the Fourth Proportional to 515,055.40, 772,583.10 and 409,301.80

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Solution

The fourth proportional to 515,055.40, 772,583.10 and 409,301.80 is: 613,952.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,055.40 : 772,583.10 = 409,301.80 : x
  2. Step 2: Convert to fraction form
    515,055.40/772,583.10 = 409,301.80/x
  3. Step 3: Cross multiply
    515,055.40x = 772,583.10 × 409,301.80
  4. Step 4: Simplify right side
    515,055.40x = 316,219,653,479.58
  5. Step 5: Solve for x
    x = 316,219,653,479.58/515,055.40
  6. Step 6: Final answer
    x = 613,952.70

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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.