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Finding the Fourth Proportional to 513,907.70, 770,861.55 and 345,946.10

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Solution

The fourth proportional to 513,907.70, 770,861.55 and 345,946.10 is: 518,919.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,907.70 : 770,861.55 = 345,946.10 : x
  2. Step 2: Convert to fraction form
    513,907.70/770,861.55 = 345,946.10/x
  3. Step 3: Cross multiply
    513,907.70x = 770,861.55 × 345,946.10
  4. Step 4: Simplify right side
    513,907.70x = 266,676,546,862.46
  5. Step 5: Solve for x
    x = 266,676,546,862.46/513,907.70
  6. Step 6: Final answer
    x = 518,919.15

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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.