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Finding the Fourth Proportional to 661,640.60, 992,460.90 and 409,698.20

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Solution

The fourth proportional to 661,640.60, 992,460.90 and 409,698.20 is: 614,547.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,640.60 : 992,460.90 = 409,698.20 : x
  2. Step 2: Convert to fraction form
    661,640.60/992,460.90 = 409,698.20/x
  3. Step 3: Cross multiply
    661,640.60x = 992,460.90 × 409,698.20
  4. Step 4: Simplify right side
    661,640.60x = 406,609,444,300.38
  5. Step 5: Solve for x
    x = 406,609,444,300.38/661,640.60
  6. Step 6: Final answer
    x = 614,547.30

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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.