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Finding the Fourth Proportional to 439,980.80, 660,230.40 and 290,652.80

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Solution

The fourth proportional to 439,980.80, 660,230.40 and 290,652.80 is: 436,150.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,980.80 : 660,230.40 = 290,652.80 : x
  2. Step 2: Convert to fraction form
    439,980.80/660,230.40 = 290,652.80/x
  3. Step 3: Cross multiply
    439,980.80x = 660,230.40 × 290,652.80
  4. Step 4: Simplify right side
    439,980.80x = 191,897,814,405.12
  5. Step 5: Solve for x
    x = 191,897,814,405.12/439,980.80
  6. Step 6: Final answer
    x = 436,150.43

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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.