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Finding the Fourth Proportional to 377,636.78, 566,455.14 and 128,318.78

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Solution

The fourth proportional to 377,636.78, 566,455.14 and 128,318.78 is: 192,478.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,636.78 : 566,455.14 = 128,318.78 : x
  2. Step 2: Convert to fraction form
    377,636.78/566,455.14 = 128,318.78/x
  3. Step 3: Cross multiply
    377,636.78x = 566,455.14 × 128,318.78
  4. Step 4: Simplify right side
    377,636.78x = 72,686,833,905.67
  5. Step 5: Solve for x
    x = 72,686,833,905.67/377,636.78
  6. Step 6: Final answer
    x = 192,478.16

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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.