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Finding the Fourth Proportional to 630,403.20, 945,604.80 and 315,475.20

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Solution

The fourth proportional to 630,403.20, 945,604.80 and 315,475.20 is: 473,212.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,403.20 : 945,604.80 = 315,475.20 : x
  2. Step 2: Convert to fraction form
    630,403.20/945,604.80 = 315,475.20/x
  3. Step 3: Cross multiply
    630,403.20x = 945,604.80 × 315,475.20
  4. Step 4: Simplify right side
    630,403.20x = 298,314,863,400.96
  5. Step 5: Solve for x
    x = 298,314,863,400.96/630,403.20
  6. Step 6: Final answer
    x = 473,212.80

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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.