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Finding the Fourth Proportional to 808,601.70, 1,212,902.55 and 509,420.10

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Solution

The fourth proportional to 808,601.70, 1,212,902.55 and 509,420.10 is: 764,130.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,601.70 : 1,212,902.55 = 509,420.10 : x
  2. Step 2: Convert to fraction form
    808,601.70/1,212,902.55 = 509,420.10/x
  3. Step 3: Cross multiply
    808,601.70x = 1,212,902.55 × 509,420.10
  4. Step 4: Simplify right side
    808,601.70x = 617,876,938,311.26
  5. Step 5: Solve for x
    x = 617,876,938,311.26/808,601.70
  6. Step 6: Final answer
    x = 764,130.15

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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.