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Finding the Fourth Proportional to 280,735.39, 387,454.35 and 178,728.27

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Solution

The fourth proportional to 280,735.39, 387,454.35 and 178,728.27 is: 246,670.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,735.39 : 387,454.35 = 178,728.27 : x
  2. Step 2: Convert to fraction form
    280,735.39/387,454.35 = 178,728.27/x
  3. Step 3: Cross multiply
    280,735.39x = 387,454.35 × 178,728.27
  4. Step 4: Simplify right side
    280,735.39x = 69,249,045,679.47
  5. Step 5: Solve for x
    x = 69,249,045,679.47/280,735.39
  6. Step 6: Final answer
    x = 246,670.17

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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.