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Finding the Fourth Proportional to 377,738.40, 566,607.56 and 128,420.40

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Solution

The fourth proportional to 377,738.40, 566,607.56 and 128,420.40 is: 192,630.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,738.40 : 566,607.56 = 128,420.40 : x
  2. Step 2: Convert to fraction form
    377,738.40/566,607.56 = 128,420.40/x
  3. Step 3: Cross multiply
    377,738.40x = 566,607.56 × 128,420.40
  4. Step 4: Simplify right side
    377,738.40x = 72,763,969,498.22
  5. Step 5: Solve for x
    x = 72,763,969,498.22/377,738.40
  6. Step 6: Final answer
    x = 192,630.59

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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.