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Finding the Fourth Proportional to 526,277.40, 789,416.10 and 421,301.40

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Solution

The fourth proportional to 526,277.40, 789,416.10 and 421,301.40 is: 631,952.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,277.40 : 789,416.10 = 421,301.40 : x
  2. Step 2: Convert to fraction form
    526,277.40/789,416.10 = 421,301.40/x
  3. Step 3: Cross multiply
    526,277.40x = 789,416.10 × 421,301.40
  4. Step 4: Simplify right side
    526,277.40x = 332,582,108,112.54
  5. Step 5: Solve for x
    x = 332,582,108,112.54/526,277.40
  6. Step 6: Final answer
    x = 631,952.10

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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.