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Finding the Fourth Proportional to 630,663.20, 945,994.80 and 618,221.60

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Solution

The fourth proportional to 630,663.20, 945,994.80 and 618,221.60 is: 927,332.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,663.20 : 945,994.80 = 618,221.60 : x
  2. Step 2: Convert to fraction form
    630,663.20/945,994.80 = 618,221.60/x
  3. Step 3: Cross multiply
    630,663.20x = 945,994.80 × 618,221.60
  4. Step 4: Simplify right side
    630,663.20x = 584,834,418,847.68
  5. Step 5: Solve for x
    x = 584,834,418,847.68/630,663.20
  6. Step 6: Final answer
    x = 927,332.40

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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.