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Finding the Fourth Proportional to 661,763.60, 992,645.40 and 412,931.60

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Solution

The fourth proportional to 661,763.60, 992,645.40 and 412,931.60 is: 619,397.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,763.60 : 992,645.40 = 412,931.60 : x
  2. Step 2: Convert to fraction form
    661,763.60/992,645.40 = 412,931.60/x
  3. Step 3: Cross multiply
    661,763.60x = 992,645.40 × 412,931.60
  4. Step 4: Simplify right side
    661,763.60x = 409,894,653,254.64
  5. Step 5: Solve for x
    x = 409,894,653,254.64/661,763.60
  6. Step 6: Final answer
    x = 619,397.40

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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.