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Finding the Fourth Proportional to 528,090.40, 790,823.40 and 423,114.40

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Solution

The fourth proportional to 528,090.40, 790,823.40 and 423,114.40 is: 633,620.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,090.40 : 790,823.40 = 423,114.40 : x
  2. Step 2: Convert to fraction form
    528,090.40/790,823.40 = 423,114.40/x
  3. Step 3: Cross multiply
    528,090.40x = 790,823.40 × 423,114.40
  4. Step 4: Simplify right side
    528,090.40x = 334,608,768,396.96
  5. Step 5: Solve for x
    x = 334,608,768,396.96/528,090.40
  6. Step 6: Final answer
    x = 633,620.24

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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.