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Finding the Fourth Proportional to 492,748.70, 739,123.05 and 212,812.70

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Solution

The fourth proportional to 492,748.70, 739,123.05 and 212,812.70 is: 319,219.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,748.70 : 739,123.05 = 212,812.70 : x
  2. Step 2: Convert to fraction form
    492,748.70/739,123.05 = 212,812.70/x
  3. Step 3: Cross multiply
    492,748.70x = 739,123.05 × 212,812.70
  4. Step 4: Simplify right side
    492,748.70x = 157,294,771,902.74
  5. Step 5: Solve for x
    x = 157,294,771,902.74/492,748.70
  6. Step 6: Final answer
    x = 319,219.05

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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.