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Finding the Fourth Proportional to 661,638.40, 992,457.60 and 630,534.40

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Solution

The fourth proportional to 661,638.40, 992,457.60 and 630,534.40 is: 945,801.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,638.40 : 992,457.60 = 630,534.40 : x
  2. Step 2: Convert to fraction form
    661,638.40/992,457.60 = 630,534.40/x
  3. Step 3: Cross multiply
    661,638.40x = 992,457.60 × 630,534.40
  4. Step 4: Simplify right side
    661,638.40x = 625,778,657,341.44
  5. Step 5: Solve for x
    x = 625,778,657,341.44/661,638.40
  6. Step 6: Final answer
    x = 945,801.60

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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.