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Finding the Fourth Proportional to 661,656.60, 992,484.90 and 409,714.20

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Solution

The fourth proportional to 661,656.60, 992,484.90 and 409,714.20 is: 614,571.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,656.60 : 992,484.90 = 409,714.20 : x
  2. Step 2: Convert to fraction form
    661,656.60/992,484.90 = 409,714.20/x
  3. Step 3: Cross multiply
    661,656.60x = 992,484.90 × 409,714.20
  4. Step 4: Simplify right side
    661,656.60x = 406,635,156,815.58
  5. Step 5: Solve for x
    x = 406,635,156,815.58/661,656.60
  6. Step 6: Final answer
    x = 614,571.30

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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.