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Finding the Fourth Proportional to 528,081.80, 792,122.70 and 509,419.40

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Solution

The fourth proportional to 528,081.80, 792,122.70 and 509,419.40 is: 764,129.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,081.80 : 792,122.70 = 509,419.40 : x
  2. Step 2: Convert to fraction form
    528,081.80/792,122.70 = 509,419.40/x
  3. Step 3: Cross multiply
    528,081.80x = 792,122.70 × 509,419.40
  4. Step 4: Simplify right side
    528,081.80x = 403,522,670,560.38
  5. Step 5: Solve for x
    x = 403,522,670,560.38/528,081.80
  6. Step 6: Final answer
    x = 764,129.10

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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.