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Finding the Fourth Proportional to 528,087.80, 792,131.70 and 509,425.40

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Solution

The fourth proportional to 528,087.80, 792,131.70 and 509,425.40 is: 764,138.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,087.80 : 792,131.70 = 509,425.40 : x
  2. Step 2: Convert to fraction form
    528,087.80/792,131.70 = 509,425.40/x
  3. Step 3: Cross multiply
    528,087.80x = 792,131.70 × 509,425.40
  4. Step 4: Simplify right side
    528,087.80x = 403,532,008,125.18
  5. Step 5: Solve for x
    x = 403,532,008,125.18/528,087.80
  6. Step 6: Final answer
    x = 764,138.10

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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.