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Finding the Fourth Proportional to 630,212.56, 869,692.78 and 343,731.76

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Solution

The fourth proportional to 630,212.56, 869,692.78 and 343,731.76 is: 474,349.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,212.56 : 869,692.78 = 343,731.76 : x
  2. Step 2: Convert to fraction form
    630,212.56/869,692.78 = 343,731.76/x
  3. Step 3: Cross multiply
    630,212.56x = 869,692.78 × 343,731.76
  4. Step 4: Simplify right side
    630,212.56x = 298,941,029,928.69
  5. Step 5: Solve for x
    x = 298,941,029,928.69/630,212.56
  6. Step 6: Final answer
    x = 474,349.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.