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Finding the Fourth Proportional to 280,235.77, 386,722.15 and 152,913.49

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Solution

The fourth proportional to 280,235.77, 386,722.15 and 152,913.49 is: 211,018.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,235.77 : 386,722.15 = 152,913.49 : x
  2. Step 2: Convert to fraction form
    280,235.77/386,722.15 = 152,913.49/x
  3. Step 3: Cross multiply
    280,235.77x = 386,722.15 × 152,913.49
  4. Step 4: Simplify right side
    280,235.77x = 59,135,033,616.80
  5. Step 5: Solve for x
    x = 59,135,033,616.80/280,235.77
  6. Step 6: Final answer
    x = 211,018.86

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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.