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Finding the Fourth Proportional to 280,735.89, 387,455.04 and 178,728.77

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Solution

The fourth proportional to 280,735.89, 387,455.04 and 178,728.77 is: 246,670.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,735.89 : 387,455.04 = 178,728.77 : x
  2. Step 2: Convert to fraction form
    280,735.89/387,455.04 = 178,728.77/x
  3. Step 3: Cross multiply
    280,735.89x = 387,455.04 × 178,728.77
  4. Step 4: Simplify right side
    280,735.89x = 69,249,362,729.50
  5. Step 5: Solve for x
    x = 69,249,362,729.50/280,735.89
  6. Step 6: Final answer
    x = 246,670.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.