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Finding the Fourth Proportional to 526,280.40, 789,420.60 and 421,304.40

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Solution

The fourth proportional to 526,280.40, 789,420.60 and 421,304.40 is: 631,956.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,280.40 : 789,420.60 = 421,304.40 : x
  2. Step 2: Convert to fraction form
    526,280.40/789,420.60 = 421,304.40/x
  3. Step 3: Cross multiply
    526,280.40x = 789,420.60 × 421,304.40
  4. Step 4: Simplify right side
    526,280.40x = 332,586,372,230.64
  5. Step 5: Solve for x
    x = 332,586,372,230.64/526,280.40
  6. Step 6: Final answer
    x = 631,956.60

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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.