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Finding the Fourth Proportional to 651,911.20, 977,866.80 and 630,138.40

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Solution

The fourth proportional to 651,911.20, 977,866.80 and 630,138.40 is: 945,207.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,911.20 : 977,866.80 = 630,138.40 : x
  2. Step 2: Convert to fraction form
    651,911.20/977,866.80 = 630,138.40/x
  3. Step 3: Cross multiply
    651,911.20x = 977,866.80 × 630,138.40
  4. Step 4: Simplify right side
    651,911.20x = 616,191,420,765.12
  5. Step 5: Solve for x
    x = 616,191,420,765.12/651,911.20
  6. Step 6: Final answer
    x = 945,207.60

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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.