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Finding the Fourth Proportional to 768,682.88, 1,152,401.04 and 319,739.60

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Solution

The fourth proportional to 768,682.88, 1,152,401.04 and 319,739.60 is: 479,350.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,682.88 : 1,152,401.04 = 319,739.60 : x
  2. Step 2: Convert to fraction form
    768,682.88/1,152,401.04 = 319,739.60/x
  3. Step 3: Cross multiply
    768,682.88x = 1,152,401.04 × 319,739.60
  4. Step 4: Simplify right side
    768,682.88x = 368,468,247,569.18
  5. Step 5: Solve for x
    x = 368,468,247,569.18/768,682.88
  6. Step 6: Final answer
    x = 479,350.14

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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.