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Finding the Fourth Proportional to 280,469.60, 387,033.60 and 153,120.64

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Solution

The fourth proportional to 280,469.60, 387,033.60 and 153,120.64 is: 211,298.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,469.60 : 387,033.60 = 153,120.64 : x
  2. Step 2: Convert to fraction form
    280,469.60/387,033.60 = 153,120.64/x
  3. Step 3: Cross multiply
    280,469.60x = 387,033.60 × 153,120.64
  4. Step 4: Simplify right side
    280,469.60x = 59,262,832,533.50
  5. Step 5: Solve for x
    x = 59,262,832,533.50/280,469.60
  6. Step 6: Final answer
    x = 211,298.60

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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.