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Finding the Fourth Proportional to 280,671.94, 387,332.85 and 153,355.42

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Solution

The fourth proportional to 280,671.94, 387,332.85 and 153,355.42 is: 211,633.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,671.94 : 387,332.85 = 153,355.42 : x
  2. Step 2: Convert to fraction form
    280,671.94/387,332.85 = 153,355.42/x
  3. Step 3: Cross multiply
    280,671.94x = 387,332.85 × 153,355.42
  4. Step 4: Simplify right side
    280,671.94x = 59,399,591,891.55
  5. Step 5: Solve for x
    x = 59,399,591,891.55/280,671.94
  6. Step 6: Final answer
    x = 211,633.52

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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.