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Finding the Fourth Proportional to 528,090.40, 792,135.60 and 490,765.60

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Solution

The fourth proportional to 528,090.40, 792,135.60 and 490,765.60 is: 736,148.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,090.40 : 792,135.60 = 490,765.60 : x
  2. Step 2: Convert to fraction form
    528,090.40/792,135.60 = 490,765.60/x
  3. Step 3: Cross multiply
    528,090.40x = 792,135.60 × 490,765.60
  4. Step 4: Simplify right side
    528,090.40x = 388,752,903,015.36
  5. Step 5: Solve for x
    x = 388,752,903,015.36/528,090.40
  6. Step 6: Final answer
    x = 736,148.40

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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.