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Finding the Fourth Proportional to 438,763.60, 658,145.40 and 404,203.60

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Solution

The fourth proportional to 438,763.60, 658,145.40 and 404,203.60 is: 606,305.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,763.60 : 658,145.40 = 404,203.60 : x
  2. Step 2: Convert to fraction form
    438,763.60/658,145.40 = 404,203.60/x
  3. Step 3: Cross multiply
    438,763.60x = 658,145.40 × 404,203.60
  4. Step 4: Simplify right side
    438,763.60x = 266,024,740,003.44
  5. Step 5: Solve for x
    x = 266,024,740,003.44/438,763.60
  6. Step 6: Final answer
    x = 606,305.40

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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.